Fish Populations Decline At Maeda Point – Not A Good Sign!

Posted on August 11, 2019 by Admin11

I originally got SCUBA certified at Maeda Misaki in 1992. I have seen this popular snorkeling location drastically change over the years with the increase in tourism. Meada point is now a high traffic area, literally thousands of people enter the water on a given weekend.

Maeda misaki diving

If you have ever been to maeda point you have seen the beautiful schools of Teira batfish (Platax teira). In the late 90’s there were massive schools of hundreds of these beautiful fish. Below is an old photograph I found in my photo album. This was a common site back in the 90’s.

Teira batfish at Maeda misaki

In 2017, I noticed that populations started declining.

Schools of batfish

2018-2019, I started seeing numbers decline to less than twenty individuals. July 2019, I went to the same location on three different days and didn’t see any batfish.

Wide angle macro

These fish are a huge tourist attraction. What could have caused the decline of the batfish populations? Possible reasons for decline:

Feeding the batfish man-made products
Noise pollution from an increase in boat traffic
Moved on to a safer location
Overfishing
Contaminates entering the water – sunblock, shampoo, perfume and urine

Fu (wheat gluten)

In the past, guides would feed the fish sausage and bread. In recent years many local companies switched over to Fu (wheat gluten). It’s much cheeper than fish sausage. Kilos of Fu enter the water for fish consumption on a given week at Maeda point. Could this gluten based product be good for the fish? Why you should not feed wild animals:

Interfere’s with their natural diet and feeding cycle
Makes the fish more vulnarable to predators
Reef algae overgrowth due to the fish being full
Increase’s your chance of getting bitten

Sometimes, I see plastic bags filled will remnants of fish food floating on the surface of the water. With the increase in tourism, I am finding more trash left behind at Maeda Point. This is a photograph I took recently at Maeda point. A collector urchin (Tripneustes gratilla) is covering up with discarded sausage wrapper.

collector urchin

This is one of my favorite photographs taken at Maeda Point.

Beautiful bat-fish

Hopefully the teira batfish populations are not a blur left behind.

Fading away

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 Chinese soft-shell turtle – Aquatic turtles of Okinawa

Posted on July 15, 2019 by Admin11

This year we have had an abundance of rain on Okinawa. Locals have been finding a great deal of turtles on the road, specifically the Chinese soft-shell turtle ( Pelodiscus sinensis ). This soft shell turtle was originally introduced as a food source. This species is currently listed as vulnerable (VU) on the IUCN Red List.

Scientific name: Pelodiscus sinensis
Common name: Chinese softshell turtle
Distribution: Introduced to most of Japan and the Ryukyu Islands
Habitat: Ponds, drainage ditches, rice paddies and farm fields.
Diet: Insects, fish, frogs, snails, and plants
Average size: 30-35cm
Color: Olive gray

An adult soft turtle found in the farm fields at night.

A large female I found laying eggs on the bank of a small water source.

A closeup of a soft turtle infested with leaches. Stop staring!

Meet chunky

The beautiful farm fields of Okinawa, prime habitat for aquatic turtles.

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 worldwide 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

Bottle Cap Challenge – No Kicking Just Picking!

Posted on July 6, 2019 by Admin11

The bottle cap challenge is a viral trend started by martial artist Farabi Davletchin. He was the first person to perform a precision spin kick and twist off the cap of the bottle using his foot. In 2017, I started a my own bottle cap challenge. The goal was to see how many twist top caps I could collect in fifteen minutes. Its an exciting challenge and I recommend getting others involved. Make it a friendly competition and document your beach trash finds using the Clean Swell app by Ocean Conservancy.

Over the years, I have seen a significant increase in the amount of marine debris washed ashore. The trash is from all over the world, but majority of it washes up from Korea, China and Japan

Next time your at the beach, take a minute and look around at the amout of single use waste on the beach. How do you feel when you see this waste?

Majority of the plastic bottles/caps that wash ashore become brittle and break down into smaller pieces. The smaller pieces (micro plastics) are harder to find and clean up.

Eventually these smaller pieces make it back into the ocean affecting the wildlife. Marine birds often mistaken and eat this plastic because it looks and smells like their natural diet (ex: fish eggs, crabs and small fish).

Even the marine fish will sometimes eat the plastic, they are attracted by the smell as well.

Hermit crabs are one of the few animals that can successfully adapt with our waste. They eventually move into this valuable real estate (plastic caps) and use it as a protective mobile home until they find a better option. Below are photographs of hermit crabs found naturally adapting with plastic twist caps.

This popular hermit crab was featured in honor of World Oceans Day 2019 on Stella McCartney’s website. Thank you all for bringing awareness to the plastic pollution problem.

If you would like to learn more about hermit crabs adapting with our waste please check out my post on “Crabs With Beach Trash Homes” by Shawn M Miller.

My Mission: To Protect and Preserve the Wildlife of the Ryukyu Islands for Future Generations. – If you would like to join my journey, check out my Patreon https://www.patreon.com/MakeTheSwitch4Nature

Your donations will help worldwide 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

Cryptic fish, Comets and Stars by Shawn Miller

Posted on July 1, 2019 by Admin11

The Comet (Calloplesiops altivelis) is a type of marine betta found in the beautiful waters of Okinawa. They hide in caves during the day. At night they come out to feed on small crustaceans. They are a mysterious fish and can be challenging to photograph. Comets are uncommon, yet very little is know about the behavior of these cryptic animals.

Scientific name: Calloplesiops altivelis
Common Name: Comet (Marine betta)
Distribution: Ryukyu Islands
Habitat: submarine caves
Diet: crustaceans and fish
Average Size: 20cm

Calloplesiops altivelis © Shawn Miller

Calloplesiops altivelis © Shawn Miller

Look close, can see the resemblance between the comet and the spotted moray eel?

Gymnothorax meleagris © Shawn Miller

When threatened the comet will stick its head into a hole and expose its tail end, which mimics the head of the a dangerous moray eel. The caudal fin also has detailed white lines that resemble the razor sharp teeth.

Calloplesiops altivelis © Shawn Miller

Having trouble getting close to marine life during your night dives? I recommend using the Light & Motion Sola 1200 red light feature. This feature enables the user to photograph marine life during the night without disturbing them. Most marine animals do not see the color red or react less to the red light.

Underwater setup with sola 600

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

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

Frogs of Okinawa by Shawn Miller

Posted on June 23, 2019 by Admin11

Individuals that study amphibians are know as herpetologists. The act of searching for these beautiful animals is known as herping. Okinawa has twelve species of frogs. They all have the ability to live in the water and on the land. Most are nocturnal and feed on insects during the night. They are found in local parks, forests, streams, puddles, and on the road at times.

If you would like to learn more about a specific frog, I attached a link above each photograph. Links in red are endangered species.

Rana ulma – Ryukyu brown frog

Babina holsti – Holsts frog

Odorrana ishikawae – Ishikawa’s frog

Limnonectes namiyei – Namie’s frog

Hyla halowelii – Hallowell’s tree frog

Odorrana narina – Ryukyu Tip-nosed Frog

Rhacophorus viridis viridis – Okinawa green tree frog

Rana limnocharis limnocharis – Asian grass frog

Polypedates leucomystax leucomystax – White jawed frog

Microhyla okinavensis – The Ornate narrow-mouth frog

Buegeria japonica – Ryukyu Kajika frog

Rana catesbeiana – American bullfrog

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

Your donations will help worldwide conservation initiatives as well as bring solutions to the worldwide pollution issues on our beautiful shorelines.

Thank you for your support. Shawn M Miller.

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

The Shorelines of Iheya Island Turn Red

Posted on May 28, 2019 by Admin11

Mass coral spawning took place this weekend on Izena, Iheya and Noho Island. I have been waiting a very long time to see this natural wonder.

Coral spawn slick

Coral spawning takes place late at night during high tide. When many species of coral spawn on the same night it naturally forms a mass of gametes know as a coral spawn slick. These coral slicks eventually wash ashore the next morning. These brightly colored coral slicks give off a very strong odor that will stick in my memory forever.

Coral spawn slick

Coral spawn slick art

Iheya beach – RW&B

While exploring the island we stumbled upon more bright coral slicks. We often explored beaches polluted with single use waste. As you can see our trash is a series problem in our oceans and the shorelines worldwide.

Coral spawn slick and trash

Pink Coral spawn slick

Look close and you can see single-use waste and micro plastic floating on the surface of the water

Coral colored spawn slick

Red coral splash

Noho Island had a thick smelling coral slick at the local fishing port. A group of locals showed up to go swimming but immediately decided it was a bad idea and went to another location.

Noho – Fishing port

Coral spawn slick washed up

Noho fishing port

Learn more about making a difference, TEDx talk | Adapting to or Changing Environment by Shawn M Miller

My Mission: To document and preserve the wildlife of the Ryukyu Islands

Your donations will help worldwide 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 Red Coral of Okinawa by Shawn Miller

Posted on May 11, 2019 by Admin11

One of my favorite types of coral is the red knotted sea fan ( Melithaea ochracea ). Mainly because of the color and the branching pattern. The vibrant red coral, white polyps and the blue water compliment one another. There are many small marine animals that thrive on the red tree of life. This beauty was photographed in the blue waters between Izena and Iheya Island.

April 4th 2019, I stumbled upon some colorful micro flatworms that I have never seen before. Leslie Harris informed me that these fast moving slugs were potentially undocumented benthic ctenophores.

Name: Coeloplana sp
Benthic ctenophore
Size: 8mm-10mm
Location: Okinawa, Japan
Depth: 40feet

Can you see how well the benthic ctenophore blends in with its host? This is a great example of mimicry.

Look close at the tiny chamber mounds. These mounds hold the stinging tentacles that are used for catching food and possibly for protection.

I found this strange benthic ctenophore (Coeloplana sp) on a dive near Ikea Island. When I first saw the ctenophore, the long stinging cells were extended out in hunting mode.

Some benthic ctenophores live on starfish (Echinaster luzonicus), look close and you can see the stinging cells.

A blue starfish (Linkia laevigata) infested with benthic ctenophores

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

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

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

Testing the Nauticam NA-D500 Underwater housing

Posted on May 4, 2019 by Admin11

It’s been a blast shooting with the Nikon D500 DSLR combined with the Nauticam Na-D500 housing. I am pleased with the superior quality and design of the entire system. My underwater rig is setup for shooting macro with two Sea & Sea YS-D2 strobes and a variety of Sola lights. I customized it slightly by mounting a Light & Motion Sola compact tray and loc-line arm kit to the bottom of the housing. This allows me to easily attach other Sola lights underwater based on my vision.

Nauticam NA-D500 shower

My favorite features of the Nauticam NA-500 Underwater housing

Internal camera lock-to prevent movement
Vacuum and leak detection system, Green is good!
Port lock system and audible housing lock latches
Super responsive optic flash system
Comfortable hand grips

I tested the Nikon D500 system with the Nikon AF-S Micro NIKKOR 60mm f/2.8G ED lens and the Nikon AF-S DX Micro NIKKOR 40mm f/2.8G lens. Both are responsive and quality pieces of glass. The great news is that they 40mm is compatible in the NAU-18701 port as well.

Below are my favorite fourteen photographs taken with the D500 underwater in the beautiful waters of Okinawa.

Bobtail Squid – D500|40mm

Hermit crab – D500|40mm

Reef squid D500|60mm

Nudibranch D500|40mm

Chromodoris hintuanensis D500|60mm

Paintpot cuttlefish D500|60mm

Dinahs Goby D500|60mm

Flatworm D500|60mm

Ryukyu Eyes D500|40mm

Pontoh’s Pygmy Seahorse D500|60mm

Fluorescence Nikon| 60mm

Bobtail squid D500|60mm

Eyes of Okinawa D500 | 60mm

If your planning on buying a Nauticam underwater housing online, I recommend Bluewater Photo, they are extremely knowledgable and have outstanding customer service.

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

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

The Eyes of the Underwater World by Shawn Miller

Posted on May 2, 2019 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. Animal eyes are challenging and exciting areas to focus on. Below are some of my favorite photographs of vision taken on the Island of Okinawa.