Marine Life Guide

Welcome to our guide to the splendid marine life that you can see on scuba dives or when snorkelling here in the Gulf of Thailand. All photos were taken only at dive sites that we visit, by Chaloklum Diving professionals and divers.

Please contact us if you find any mistakes – expert advice is greatly appreciated!

Fish, Reptiles and Squirts; Chordata in Koh Phangan

Chordates all possess some kind of backbone; this covers a vast range of life-forms; from the primitive Sea Squirt up to (the so-called advanced…) Homo sapiens!

(3 smallish + 1 massive Album)

Koh Phangan Sea Cucumbers, Sea Urchins and Sea Stars: Echinodermata

The latin name means literally “spiny skin”. They all feature 5 part radial symmetry, an internal calcium carbonate skeleton and a hydraulic system which controls their tube feet.

(3 Albums, 2 Galleries)

Bryozoans, aka Ectoprocta in Koh Phangan

One of the last relatively unexplored lifeforms; we seem to have several bryozoans around here that don’t appear in any of the few reference guides available. If only we had the time (and an electron microscope)…

(1 Gallery)

Molluscs - Mollusca in Koh Phangan

Nudibranch/Sea Slugs, Sea Snails, Bivalves, Squid and Octopus. Great biodiversity and a whole load of really fascinating beasties. We like a mollusc!

(4 Big Albums)

Crustaceans - Phyllum Arthropoda in Koh Phangan, Thailand

Crabs, Prawns, Shrimps, a Lobster and some Barnacles. A diverse group that all have an external skeleton, jointed limbs, antennae and compound eyes.

(1 large album, 4 Galleries)

Annelid Worms - Annelida in Koh Phangan, Thailand

Some tube dwelling beasties that stick things out to feed, plus the crawling, poisonous fire/bristle worms and the parasitic marine leeches.

(7 Galleries)

Flatworms - Platyhelminthes around Koh Phangan

Sometimes confused with Nudibranchs, these relatively primitive beasts can glide along the bottom and occasionally swim by undulating their bodies.

(7 Galleries)

Corals and Much More - Cnidaria in Koh Phangan, Thailand

Corals, Anemones, Corallimorpharians, Hydroids and Jellyfish; a massive range of invertebrate animals with an incredible variety of life forms. They are all radially symmetrical with tentacles around a central mouth, a primitive gut and stinging cells.

(4 Albums, 2 Galleries)

Sponges - Porifera

A simple life-form and yet a fascinating range of shapes, sizes and colours. High species diversity and many complex associations with other organisms; which is good going for sedentary filter-feeders!

(5 Galleries)

Marine Algae and Seaweeds - Plantae Plus

The most primitive life form and the base of the food chain, supplying a massive network. Including various algae, sea weeds, sea grapes and sea grass.

(3 Galleries)