Hydroids; Hydrozoa

Watch out for Hydroids! When diving or snorkelling you must beware of these delicate structures, as they pack an unpleasant sting. They are in fact colonial animals and can be encountered at most of our local dive sites.
Then again, it’s best for Koh Phangan marine life as well as your own comfort not to touch anything at all underwater!

Feathery Hydroids, Aglaopheniidae

Delicate, feather-like structures that are poisonous to touch.

Pennaria disticha, Pennariidae

Another fouling organism, spread around the planet by boat.

Hydropolyps; Tubulariidae

Beautiful, small, delicate structures. Technically they are classed as fouling organisms.

Other Hydroids; Hydrozoa

The families Corymorphidae, Eudendriidae, Haleciidae and Oceaniidae . They are all equipped with a battery of stinging cells.

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