The lionfish is a common site in the Andaman and seen on all of the dive sites we go to, both by daytrips and liveaboards.
Nobody knows for sure how they got their name, and they are also known as turkey or dragon fish in some area’s. One thought is when they spread out their pectoral fins it sort of looks like a lion’s mane, and they are ferocious predators

They are beautiful and fascinating fish but due to their colouring, as is common in nature, most times bright and beautiful means dangerous. Its bright colours advertise its poisonous tentacles. The venom of the lionfish, delivered by up to 18 needle-like dorsal fins and is purely defensive. A sting from a lionfish is extremely painful to humans and can cause nausea and breathing difficulties, but is rarely fatal.
The scientific name for the lionfish is Pterois, and there are fifteen different species in the Pterois Genus of fish.

The largest of the lionfish species can grow to about 40cm in length, but the average is closer to 30cm, with the smallest around 6cm, and they weigh somewhere around 500 to 900g. Their lifespan in the wild can be around 15 years.

They are mainly active during the day and at night the Lionfish find crevices among rocks that they rest in, this is so they are not out of the open where they would be at risk of predators consuming them.

It relies on camouflage and fast reflexes to capture their prey which is mainly fish and shrimp.. Adult lionfish use their distinct pectoral fins to attract the prey. As soon as the prey comes within their reach, they swallow it in a single motion. Though not quite unique, this method of hunting is highly successful in regions where the lionfish is a non-native species as the native population of the area is not used to such traps. They are able to move around very quickly in the water. They are very good at using those long pectoral fins to herd fish and other prey into a confined area, trapping it making it simple for them to get their food. The lionfish’s stomach can expand to 30 times its normal size so they can really fill up, this is why it is such an invader in the Caribean.

They are solitary and they will become very aggressive if they feel that their home territory is at risk. The males tend to be more aggressive overall than the females. While adult lionfish are solitary creatures, juveniles are known to live together in groups. Over the course of time, they become highly territorial and don’t even hesitate to take on the other members of their group to capture and/or defend their territory.

The native habitat of lionfish spans the rocky crevices and reefs of the Indo-Pacific waters, but they can be found in the eastern coast of America. It is not clear how they have found their way there but it is thought that some specimens who were released by certain aquariums, and have begun to thrive in these warm waters without any natural predators. There is one documented case of lionfish escaping from an aquarium located in a house damaged by Hurricane Andrew – the fish were seen swimming nearby after the storm. The “on purpose” introductions are assumed to occur from hobbyists who dumped them into canals (not knowing any better) when the fish either got too large for their aquariums or became unwanted. Genetic evidence from recent scientific results suggests multiple introductions.

Learn more about marine life in the area with our AWARE Fish ID, Naturalist or Advanced open water courses.

Family name: Antennariidae
Order name: Lophiiformes
Common name: Frogfish or Anglerfish
Scientific name: Antennariidae
Frogfish are very misunderstood and very little is known about this unique underwater lie-in-wait predator. They live generally on the ocean floor around coral or rock reefs throughout tropical and subtropical waters. Most species live in shallow water although some species are deep dwelling. Recreational divers in Asia are most likely to spot certain species including giant, clown and painted frogfish.

Around the Andaman we have seen frogfish in the Similans, Richelieu Rock, Koh Tachai, Koh Doc Mai, Phi Phi, Racha Yai and Noi.

Frogfish, are named because of their squat resemblance to the common amphibians, they range in size from around 5cm to the giant frogfish’s 40cm. The resemblance to frogs is that their fins are more like legs, which they use to walk slowly over the sea bed and on top of sponges and corals to lie in wait for their prey.
Colour is often not much help in identifying different frogfish since they can change this to allow themselves to camouflage and blend in with the environment they are in. Depending on the species, this change might take seconds or weeks. Some frog fish’s skin is also covered by bumps, flaps, hairs and tassles which further allow for mimicking the nearby seabed, corals, sponges or weeds. This also explains how divers can often cruise straight past, not noticing their presence.

There are not many other fish that you could mistake for a frogfish but it can be exceptionally difficult to distinguish between the sexes or species. Unless you get out your scalpel, there is no way to tell male from female. Since colouration is not a method of identification for all but the most rare species, you should be looking out for species-specific features such as what form the lure takes (maybe it is mimicking a worm or fish), the number of eye spots and the number of spines.
Frogfish move very slowly but they have the fastest strike speed of any other animal on earth. They move by gulping water with their massive mouth, then forcing the water through the gills, this allows them to move about the reef or bottom.

As the frogfish is scaleless and unprotected camouflage is an important defense against predators. Some can also inflate themselves, like pufferfish, by sucking in water in a threat display. In aquariums and in nature, frogfish have been know to when moved from their hiding spots and are clearly visible, to be attacked by clownfish, damselfish, and wrasse, and even to be killed.
It is the feeding approach of anglerfish that makes it such interesting creatures. They are perfectly camouflaged and lie in wait for any prey. The lure may be used to attract prey in a variety of different ways, depending on the species.

They can also use a chemical attractant so sometimes they just lie in wait for some unfortunate creature to venture too close. When the prey is within grasp the attack takes place. The frogfish expands its oral cavity engulfing the prey with a reflex that instantly sucks it in by creating suction pressure inside the mouth. Taking no more than around 6 milliseconds.

Frogfish have also been seen stalking their prey by sneaking towards their target along the sea bed.

They eat mostly small fish, shrimps and crabs but their prey sometimes being up to twice their own body size. As they are toothless the frogfish swallows its prey whole, allowing digestive enzymes to do the rest. The prey can often be seen twitching and writhing against the walls of the its stomach until they no longer are alive. Frogfish have also been observed to eat lionfish; the poison appears to have no effect on them.  In addition to expanding their mouths, frogfish can also expand their stomachs to swallow animals up to twice their size.

What eats anglerfish? the main answer is another frogfish, they are known for being cannibalistic. However considering that they are designed more to catch fish swimming in the water column, this is a rather rare phenomenon. Moray eels have also been witnessed eating frogfish, but again, this is an uncommon sight.

Learn more interesting facts about the local marine life to Phuket by joining us on a Naturalist or Fish ID specialty course.

In Thailand we have many “special days’ or festivals as the Thai people as a nation love holidays.

Loi Krathong (or Loy Krathong) is probably the most beautiful event in Thailand. The time of year it takes place depends on when the full moon of the 12th month in the Thai lunar calendar is, for this year it is on the 28th of November.

It is a festival of quiet celebration, which the whole family enjoys together. The origins of Loy Kratong are unclear, but it is believed that it started in Sukhothai to the north of Bangkok, which was one of the most powerful cities in Asia around 800 years ago. The festival is believed to originate from the ancient practice of paying respect to the spirit of the waters.
Loi literally means ‘to float,’ while krathong refers to the lotus-shaped receptacle which can float on the water, the krthong is made from the cellulose trunk of a banana tree. Great care is taken to decorate the kratongs with flowers and banana leaves, leaving room for the candles and 3 sticks of incense, the act of floating away the candle raft is symbolic of letting go of all one’s grudges, anger and defilements, so that one can start life afresh on a better foot.

At sunset on the 28th, take your krathong to the nearest beach, lake or similar watery area and release it with the outgoing tide or current. The belief being, that if the krathong floats away from you, the coming year will bring good fortune, if it floats back towards the shore, then perhaps your luck may not be quite as you had wished.
On releasing the kratong, you can help your fortunes along a little by placing personal items on the floating platform. Some put nail clippings or strands of hair into the krathong, in the belief that the sins of the past year will be washed away; coins too are often placed inside as a way of making merit. It’s believed the “boat” will carry your bad luck into the distance, and enable a better start to the following year. Loy Kratong is a big night for lovers. Couples who make a wish together on this day will enjoy long-lasting love, especially if their kratongs remain together on the water.

Thai’s and tourists alike usually set the kratongs on the sea, creating a scene as thousands of candlelit kratongs bob on the waves. All of Phuket’s major west coast beaches take part in Loy Kratong festivities. Nai Harn Lake and Patong Beach usually have the most activity with locals visiting beaches like Kata and Karon.

On the same evening you will also see many lanterns sent up into the sky, this is due to the festival of Lama which coincides with Loi Krathong. The lanterns which are made of thin fabric such as rice paper have a candle inside which when lit heats up the air and sends the lantern upwards. This means we have lights floating in the sea and lakes and lanterns lighting up the sky’s.

Peacock Mantis Shrimps (Odontodactylus scyllarus)

They are found in the indo Pacific region and we have many of these on all of the dive sites we visit, but you do have to look closely for them.
Although called shrimp they are not actually true shrimp, but a separate family of crustaceans called Stomatopods.

They are mostly found at the base of reefs where they build their burrows, the excavate a u shape tunnel by collecting nearby rubble or other substrate to go over and around suitable sites of rock crevices or corals.

They are very colorful and flamboyant when you find them, with red, green and blue warning coloration.

They feed on various fish and invertebrates and are fast, efficient hunters, though they often wait for their prey to walk by and pounce on them. The peacock is a ‘smashers’ type of mantis shrimp it has two club-like appendages to exo skeleton animals such as crabs, clams and snails. With just one hit the ‘club’ produces a force almost as fast as a 22-caliber bullet, 10m per sec, and this has been know to break aquarium glass. This is so fast it can actually vaporize the water at the point of impact!

In addition to the smashing clubs they also have a shorter body compared to the longer, very flexible tail, this lets them turn quickly and easily in tight spaces and burrows. The tail and the specialized swimming appendages on its underside provide a surprisingly fast swim when on the hunt, or when they get scared.

The eyes are stalk like which allows them to accurately see their prey from the protection of the crevices they live in, the eyes are complex with at least 8 types of different colour sensors, which include ultraviolet and polarized light. They can see 10 times more colours than humans.

From the mantis shrimps that have been kept in captivity, we have learned that they are the only invertebrates that can actually recognize individuals, they do this by body odor!!
They can be aggressive with others of there own species and get into fights using the flexible tails, they sometimes can fight to the death, but often decide who is victorious before either gets seriously hurt.

Some of the shrimps can mate for life, which can be up to 20 years, whilst others prefer a one-night stand. They usually court then come together. The female can hold fertilized eggs under the tail or in the forearms, or they can be laid in burrows and are watched over until they hatch into Larvae. These larvae are also keen predators often preying on other larvae during the 3 months it takes to hatch.

To see these fascinating shrimps you can join us on our daytrips or liveaboards where they are often seen at the divesites, ask our staff about them and other interesting creatures we have in the waters of Thailand.

Learn more about the marine life in our area by taking the Naturalist specialty course with us.

Second trip for MV Scuba Adventure of the High Season was a Full Charter going out to Phi Phi Islands for 2 days/1 Night and 7 fantastic dives.

As part of the trip we had 1 person doing Discover Scuba Diving (first time ever diving), 1 completing his open water course, 4 people finishing and 1 person doing the full Advanced Open Water Course as well as 6 people just fundiving -and then a single snorkler…

Weather was very nice and vizibility on most dives was more than 20 meters… Most divers got to see Leopard Sharks, Black Tip Reefsharks and Seahorses… With the usual Barracudas, Seasnakes, Spiny Lobsters, Cuttlefish and Nudibranch thrown in for good measure…
-but no matter how good the diving was, the most memorable from the trip is probably the food.. Our cook really outdid herself on this trip..

Thanks to everyone for a great trip..

The Scuba Cat Team