Good Luck Charms on Okinawa – The Chiragra Spider Conch

Posted on June 30, 2020 by Admin11

Conch shells are locally collected for food on Okinawa. The shells are used for shell craft and jewelry. The Chiragra spider conch (Harpago chiragra) is considered a good luck charm. It is known to bring good fortune, worn of evil spirits, and provide protection against fire. The Okinawans place the Chiragra spider conch on the outside of houses and buildings.

Chiragra spider conch (Harpago chiragra)

Below are some of my favorite conch shells found in Okinawa.

Euprotomus bulla
Euprotomus aurisdianae
Euprotomus vomer
Lentigo pipus
Lentigo lentiginosus
Sinustrombus sinuatus
Lambis lambis
Thersistrombus thersites

Lambis scorpius - scorpion conch — Lambis scorpius

The beautiful conch shells are commonly confused with the hazardous cone shells. The main difference is that conch shells have a stromboid notch. A small side slit or indentation which allows the animal to see while moving. The conch shells movement is much different as well, they travel using a jumping style movement instead of a steady crawling motion.

Strawberry conch shells © Shawn Miller Conomurex luhuanus — Conomurex luhuanus

My daughter and I found this mutated strawberry conch shell in 2018. This is the first four-eyed conch shell I have seen. They naturally have two eyes, not four.

My Mission: To Document and Preserve the Wildlife of the Ryukyu Islands

This site is also designed to help people identify the beautiful animals of Okinawa, basically to serve as an online nature reference guide. If you would like to make a contribution to support my mission, please click on the donation link paypal.me/maketheswitch4nature

Your donations will help conservation initiatives as well as bring solutions to the worldwide pollution issues on our beautiful shorelines. Thank you for your support, Shawn M Miller.

The Paintpot Cuttlefish – Cephalopods in Okinawa

Posted on October 13, 2019 by Admin11

The Paintpot cuttlefish (Metasepia tulbergi) is one of the most beautiful marine animals in Okinawa. The skin of the paintpot cuttlefish is toxic (poisonous) if consumed. The paintpot cuttlefish contains a neurotoxin called tetrodotoxin (venom) used to paralyze its prey. Avoid handling or harassing this beautiful animal. If bitten, seek immediate medical treatment.

Scientific name: Metasepia tulbergi
Common name: Paintpot cuttlefish or flamboyant
Distribution: Ryukyu Islands
Habitat: Sandy bottom and coral reefs
Diet: Crabs, shrimp, and fish
Average size: 50-80mm
Color: Golden-yellow with red coloration

Cool facts about the Paintpot Cuttlefish

They have eight arms and two tentacles
They are capable of producing a dark cloud of ink to escape from predators
They have a parrot-like beak used for eating prey
They use jet propulsion to move quickly through the water
They can change their texture, pattern, color, and shape
They use their arms to walk on the sand
They are considered venomous and poisonous

When threatened, the paintpot cuttlefish produces vibrant colors to warn predators that they are toxic. The scientific term for this is aposematism.

They have a two-part parrot-like beak used for feeding.

Cephalopods can produce a cloud of ink to confuse and escape from predators when threatened.

Below is a sequence of images, displaying their ability to change texture, shape, and color. They are masters of camouflage. An example of how well they blend into their environment.

If detected or threatened, they will display colorful warning signs.

Every year, I look forward to finding the gigantic paintpot cuttlefish named Paintpot-Zilla.

My Mission: To Protect and Preserve the Wildlife of the Ryukyu Islands for Future Generations

If you would like to help me make a difference Please check out my Patreon Site https://www.patreon.com/MakeTheSwitch4Nature

Your donations will help conservation initiatives as well as bring solutions to the worldwide pollution issues on our beautiful shorelines. Thank you for your support, Shawn M Miller.

#MakeTheSwitch4Nature

The Art of Underwater Wide-Angle Photography – Tokina 10-17mm fisheye

Posted on September 7, 2019 by Admin11

I started shooting with the Tokina AT-X 10-17mm f/3.5-4.5 DXA back in 2012. It is the most popular fisheye lens used for wide-angle underwater photography. It is also known for its close focusing capabilities underwater and on land. The lens is a high-quality product built for professionals working in the field. The Tokina 10-17mm Fisheye is my favorite lens in my bag and has been my go-to lens for the project “Crabs with Beach Trash Homes“

If you plan on using the fisheye lens underwater, you will need an underwater housing. I currently use the Nauticam Na-D500 with the 100mm Zen dome port (Dp-100-N120T).

If you want to use the zoom function underwater, you must attach a zoom ring (P#19127) to the lens. The Nauticam zoom ring installation process is relatively easy.

Below are some of my favorite underwater photographs taken with the Tokina AT-X 10-17mm f/3.5-4.5 DXA combined with my older Ikelite underwater setup. I mainly focus on macro photography, but I will be pushing myself to shoot more wide-angle this year.

Okinawa is best known for its beautiful beaches and seascapes. All photographs were taken with the Tokina AT-X 10-17mm f/3.5-4.5 DXA.

Learn more about my favorite lens @ Tokinalens.com

I want to thank Tokina, Light & Motion, Nightsea, and Black Fin Grouper for all their continuous support over the years.

Have a great day!

Masters of Evasion – The Bobtail Squid of Okinawa

Posted on June 10, 2019 by Admin11

The spotty bobtail squid ( Eumandya parva ) is a small cephalopod found in the beautiful waters surrounding Okinawa. They are hard to find due to their small size. Persistence, patience, and diving with a buddy with good eyes will increase your chances of finding them.

Scientific name: Eumandya parva
Common Name: Bobtail Squid
Found: Ryukyu Islands
Habitat: Open water @ night
Average Size: 15mm – 25mm

Bobtail squid have eight arms and two tentacles used to capture prey. They have a two part parrot-like beak used for feeding. They primarily feed on small crustaceans free swimming in open water.

What’s really impressive about cephalopods is that they are masters of evasion. They are equipped with advanced mirroring cells. These cells can change shape and color to match their surrounding. These vibrant chromotophores are also used for communication and attracting a mate.

The bobtail squid has the ability to produce a large ink cloud (smoke screen) when in danger. This cloud of ink will confuse predators and give the squid a chance to escape safely.

Squid have wing-like fins used for precision movement through the open water. Their siphon is used for jet propulsion, allowing a clean getaway from predators.
They can also evade predators by covering up with sand to avoid detection.

I found this large Euprymna brenneri covering itself with sand to avoid detection. I have only seen two of these in the waters of Okinawa. A new species decribed in December 2019.

Mating season occurs in the summer months.

Look close and you can see the white bundle of spermatophores produced during the mating process. The eggs will be fertilized and attached to a safe location under a reef ledge. Tiny bobtail squid will hatch from their eggs in three weeks.

If you would like to learn more about the Cephalopods of Okinawa, check out my previous posts on the blue-ringed octopus, pygmy squid, pharaoh cuttlefish and the shell eating octopuses of Okinawa.

My Mission: To Document and Preserve the Wildlife of the Ryukyu Islands

Your donations will help conservation initiatives as well as bring solutions to the worldwide pollution issues on our beautiful shorelines. Thank you for your support, Shawn M Miller.

#MakeTheSwitch4Nature

Get Fa-Millerized with the Nature of the Ryukyu Islands – – – SUBSCRIBE BELOW

Parasitic slugs of Okinawa

Posted on March 2, 2019 by Admin11

Gymnodoris nigricolor Is a tiny nudibranch that attaches to the fins of gobies. It is found in the winter months and then it seems to completely disappear when the water warms up. This nudibranch is by far the hardest to photograph because of its size and it stays attached to it’s host. When the goby feels threatened, it retreats into its burrow taking the tiny slug down the hole with it.

In order to photograph sand-dwelling gobies you will generally need a 50mm-100mm macro lens.

Be patience and move slowly. If your lucky the goby will accept your presence without retreating.

February 2018, I was fortunate to find Gymnodoris nigricolor crawling on the sand in search of a host

When the slug finds a host it will attach onto the closest fin.

Look close and you can see the buccal apparatus of the slug clamping down.

Once its locked down, the goby cannot shake the slug off.

No one really knows what happens next. Why does the nudibranch attach to the fins of its host？ Does this specialist feed on only the fins of gobies or is there another reason？

If you would like see stunning photographs of more sea slugs check out my post on nudibranchs

My Mission: To Document and Preserve the Wildlife of the Ryukyu Islands

Your donations will help conservation initiatives as well as bring solutions to the worldwide pollution issues on our beautiful shorelines. Thank you for your support, Shawn M Miller.

#MakeTheSwitch4Nature

The benefits of changing your colors by Shawn Miller

Posted on September 4, 2018 by Admin11

How cool would it be to have the ability to change colors in a matter of seconds? In the beautiful waters of Okinawa, we have a few fish that are capable of changing color quickly.

The Arrow Bulleye (Priacanthus sagittarius) is a stunning dark ruby red when its hiding from predators. It stays close to the coral reef and blends in well.

Red Bigeye ( Pricanthus sagittarius )

When the Arrow Bullseye is threatened, it flees into open water and changes to a lighter color.

Red Bigeye ( Pricanthus sagittarius )

It eventually changes to silver in a matter of three seconds

Red Bigeye ( Pricanthus sagittarius )

Another example of color change happens at the cleaning station. A cleaning station is a designated location where fish come to get their skin, fins, eyes, mouth, teeth, and gills cleaned by cleaner fish. This is an example of Mutilism. The cleaner fish gets fed fresh parasites and the client gets cleaned. All fish swim into the cleaning station and patiently wait to get cleaned.

The blue-lined surgeonfish and rabbitfish (video below) pull into the station and immediately turn dark in color. The purpose of this is so the cleaner fish can spot the parasites easier and speed up the process.

Fish cleaning station

They naturally change back to their lighter color when the exit the cleaning station.

Nice and clean

Check out this rare event in nature, that few will ever see in the wild.

Could the increase in tourism contribute to fish disease and parasites? Is it possible the cleaner fish can’t keep up?

Isopods and copepods are bloodsucking parasites commonly found at Maeda point. In the recent years, tourism has increased and some days thousands of snorkelers enter the water. Parasites occur naturally but with the increase in tourism, I believe they are becoming more abundant.

One possible reason is due to guided fish feeding tours. They often feed the marine life large amounts of fu (harvested wheat rolls) and other manmade items. In the past, it was popular to feed the fish processed sausage. I have been diving Maeda point since 1992. I have observed a decline in healthy coral colonies and other marine life. I have also seen more fish with skin disease and parasites in recent years. Below are some fish with parasites photographed at Maeda point.

Isopod- Renocilla bollandi

Rhabdamis sp

Filefish with tiny parasites

Twin spot lionfish and parasites

Pennantfish and parasite

Firefish with parasites

Butterflyfish and parasites

Parasite infestation

Damselfish with parasite

My Mission: To Document and Preserve the Wildlife of the Ryukyu Islands

Your donations will help conservation initiatives as well as bring solutions to the worldwide pollution issues on our beautiful shorelines. Thank you for your support, Shawn M Miller.

#MakeTheSwitch4Nature

Searching For The Strawberry Conch in Okinawa By Shawn Miller

Posted on April 29, 2018 by Admin11

The Strawberry conch (Strombus luhuanus) is a popular food source found on the Island of Okinawa. Locals know as uchinanchu (sea people) search for this marine snail during extreme low tides. The sweet tasting meat of the conch shell is sought after during the summer months.

The beautiful people of Okinawa © Shawn Miller

After harvesting and consuming the conch meat, the shells are giving back to the ocean in large piles. This will provide shelter for marine-based hermit crabs and eventually stabilize the sediment.

Thousands of conch shells © Shawn Miller

Marine hermit crab

Land hermit crabs are often found next to these onshore shell piles, scavenging on conch meat remains.

Hermit crabs of the Ryukyu Islands The beautiful people of Okinawa © Shawn Miller

Ryukyu shell art © Shawn Miller

The animal has strange eyes located at the end of long eye stalks. The eyes color is usually a vibrant green, yellow and orange combination.

Strawberry conch shell © Shawn Miller

Take a close look at this strawberry conch below. What do you see? I see two extra eyes poking out of the stromboid notch. The marine snail naturally has two eyes, not four.

Four-eyed Strawberry conch © Shawn Miller

What is the cause of this? Could this deformity be caused by nutritional deficiencies, a genetic disorder or pollution?

Four-eyed Strawberry conch © Shawn Miller

Photographed on white for the meet your neighbours project

Four-eyed Strawberry conch © Shawn Miller

The strawberry conch © Shawn Miller

Regardless of the cause, I hope these images will inspire people to care more about nature and make a positive impact in the environment. We all depend on the ocean in some form. Let’s work together to make a difference.

Protect what we love © Shawn Miller

My Mission: To Document and Preserve the Wildlife of the Ryukyu Islands

Your donations will help conservation initiatives as well as bring solutions to the worldwide pollution issues on our beautiful shorelines. Thank you for your support, Shawn M Miller.

#MakeTheSwitch4Nature

– If you would like to use any of my photographs for a publication or website please contact me directly. Do not use any of my images without permission! Shawn Miller

Patterns, textures and colors ! Underwater Macro Photography by Shawn Miller

Posted on October 19, 2017 by Admin11

Okinawa offers some of the best Scuba-Diving in the world. I really enjoy the Art of Underwater Macro Photography. Macro subjects can always be found, it just takes some imagination and good framing to create beautiful underwater abstracts. Pattern’s, textures and vibrant colors generally stand out in underwater photography.

Equipment used

Camera: Canon 70d with Canon 100mm&60mm
Housing: Ikelite underwater housing
Stobes: Ikelite DS160 & DS 200
Modeling lights: Light&Motion Gobe 800, Sola 3800 and Sola 1200
Specialized lights: Light&Motion Sola Nightsea

All images were taken in the beautiful waters of the Ryukyu Islands. Underwater Photography by Shawn Miller.

Cushion starfish (Culcita novaeguineae) 100mm

Cushion starfish (Culcita novaeguineae) © Shawn Miller

Coral (Favia sp) © Shawn Miller

Deep water coral (Tubastrea micrantha) © Shawn Miller

Pedum spondyloidum- coral scallop © Shawn Miller

Feather star © Shawn Miller

Stichopus variegatus sea cucumber- 100mm

(Stichopus variegatus) sea cucumber © Shawn Miller

Sea fan (Annella mollis ) © Shawn Miller

Favia sp coral closeup © Shawn Miller

Feather duster worm (Sabellastarte sanctijosephi) © Shawn Miller

granulated sea star (Choriaster granulatus) © Shawn Miller

Crocea clam (Tridacna Crocea) © Shawn Miller

(Pachyseris speciosa) Ringed plate coral © Shawn Miller

Razor coral © Shawn Miller

Striped triplefin (Helcogramma striata) on coral © Shawn Miller

coral of okinawa © Shawn Miller

Bubble coral (Plerogyra sinuosa) © Shawn Miller

Dive safe and have a great day!

Nudibranchs – Colorful sea slugs of Okinawa

Posted on January 7, 2017 by Admin11

Nudibranchs are shell-less gastropods. They are some of the most bizarre-looking underwater animals found in our oceans. They can be challenging to find due to their small size and confusing patterns. Nudibranchs are slow-moving, delicate and lack a protective shell. Some are extremely distasteful and bright colors warn predators that they are toxic. Some even have the ability to ingest stinging cells and use them as a form of protection.

The best way to find sea slugs: Move slow! Search around sponges, hydroids, sea squirts, anemones, soft coral, rocks and reef ledges.

Train the eye: They can be challenging to find, I recommend tagging along with experienced divers that already have an eye for finding them.

Below are some of my favorite images of sea slugs. Photography by Shawn M Miller.

Learn more about the beautiful sea slugs of Okinawa. Check out Dr. Bolland’s Website!

My Mission: To Document and Preserve the Wildlife of the Ryukyu Islands

Your donations will help conservation initiatives as well as bring solutions to the worldwide pollution issues on our beautiful shorelines. Thank you for your support, Shawn M Miller.

#MakeTheSwitch4Nature

The Art of Underwater Motion by Shawn Miller

Posted on September 5, 2016 by Admin11

As an underwater photographer, there will be a time when you feel all your photographs look similar and you might lose interest for a while. Creating motion in still photographs will definitely give you a new challenge and purpose. The goal is to try to show some type of motion in a still photograph. The photographs emphasize the energy, power and or speed of the subject moving. Dramatic motion images will provide depth and variety to your portfolio.

Try panning or dragging the shutter underwater

Move the camera in sync with the moving subject while the shutter stays open. A slow shutter speed will be necessary to achieve this.
Once you understand this technique try adding flash at the end of the exposure to freeze the motion of the subject (Rear curtain sync).
Get creative and add a spin the camera