Sea stars, from the cushion star to the crown-of-thorns. Most of them are in plain sight on any dive, and much of their interest is in what lives on them rather than in the animal itself.
Several are habitats. The cushion star and the horned sea star carry commensal shrimps underneath, and turning a sea star over to look is the reason a number of the shrimp entries in this index exist. The sand-sifting sea star spends most of its time buried and is found by the trace it leaves.
The crown-of-thorns is the exception in every way. It is venomous, it eats coral, and its population outbreaks are the reason it gets counted rather than admired. The spines go through a glove.
Every one has a page. They are shown as a list rather than as pictures because nothing has been photographed or logged for them yet, and a species with nothing behind it should not sit in front of one that has.
How many of the 18 carry a record at each destination. A species usually carries several, so these do not add up to 18.
All 1316 species in one index, with filters for destination, rarity and hazard.