Beautiful photography and lots of species specific information.

MarineBio.org is an evolving online tribute to all ocean life, marine biology, and marine conservation. They have an excellent species database.

Keoki Stender's ID guide for Hawaii, the Indo-Pacific and more... Beautiful photography of fishes, corals, invertebrates, sea turtles, birds, seaweeds, plants and more,

Dedicated to the understanding of marine life through research, education, conservation and innovation.