Pelamis platurus See http://en.wikipedia.org/wiki/Pelamis_platurus
There are many different species of 'sea snake' - if you care to read the Wikipedia page in the related link - you'll see the different species along with their scientific names.
The scientific name of sea lilies are crinoid
There are 55+ different species of sea snake here are a few: Yellow Sea Snake Yellow-lipped Sea Krait Crocker's Sea Snake Guinea's Sea Krait Blue-lipped Sea Krait Saint Girons' Sea Krait Niue Sea Krait Black-banded Sea Krait Black-and-yellow sea snake Spiny-headed Sea Snake Stoke's sea snake Turtlehead sea snake Jerdon's sea snake Yellowbelly sea snake (also known as pelagic sea snake) Olive sea snake Garman's sea snake Beaked seasnake Ornate Reef Seasnake
the scientific name of a sea turtle is chelonia mydas....
The scientific name for sea-fans is Gorgonia.
The name of the class that sea cucumbers belong to is Holothuroidea.
Olive Sea snake
Olive snake the full name of it is the olive brown sea snake
The scientific name for sea grape is Coccoloba uvifera.
The scientific name of Warty sea cucumber is Parastichopus parvimensis.
The scientific name for necklace sea stars is Astropecten polyacanthus.
The scientific name of a cushion starfish is Culcita novaeguineae.