Fish, Reptiles, Squirts and a Whale; Chordata

This phylum contains the most highly developed marine lifeforms (we are chordates too – rather more advanced than a sea squirt), all possessing some kind of backbone at some point in their development.

Differing from the bony fish in that their skeletal structure is composed of cartilage. The most primitive of the fish and one of the best adapted, until man came along... (2 Albums)

Our largest whale, and the only one of these fine creatures we have photographed so far. (1 Gallery)

From Malabar Groupers down to Pygmy Gobies we've got a fine range of sizes, colours, shapes and habits. Excuse some slightly inaccurate classification, otherwise it gets too complicated... (29 Albums, 10 Galleries)

Seen mainly at the Marine Park and Koh Tao, but we've met them here in Koh Phangan waters too. (3 Galleries)

Easily confused with the sponges, sea squirts are also sessile (non-moving) filter feeders - they are either solitary or colonial in growth habit. Unlike the squirts, salps are pelagic, often found in long chains of clear, jellylike cubes. (2 Galleries)