Other studies have not had access to suitable material for broad taxon sampling, in particular for monoplacophorans, a class of small deep-sea molluscs that still remain rare and largely inaccessible [ 3, 4].
Its rich biodiversity reserves also include sea cucumbers, molluscs, crustaceans, herrings, groupers, and snappers.
The sacoglossan (sea slug) molluscs Elysia chlorotica and E. viridis (Plakobranchidae) acquire plastids on ingestion of the siphonaceous alga Voucherea litorea (termed "kleptoplasty") and, by maintaining sequestered plastids in an active photosynthetic state, has emerged as a model organism for the transfer of nuclear-encoded plant genes from algal symbiont to its animal host [ 165].
The animals raised included finfish, aquatic reptiles, crustaceans, molluscs, sea cucumbers, sea urchins, sea squirts, and jellyfish.
Sharks, turtles, stingrays, dolphins, sponges, sea cucumbers and molluscs also thrive in these deep-blue waters.
They enlisted a menagerie of creatures, such as a molluscs, sea turtle and squid, with hidden lenses to get up close and personal for a new BBC natural history programme.
These include crabs, molluscs, sea urchins, starfish and polychaete worms.
It preys mostly on marine invertebrates such as sea urchins, various molluscs and crustaceans, and some species of fish.
It has a varied diet, consisting mainly of bony and cartilaginous fishes and also including crustaceans, molluscs, sea snakes, and cetaceans.
Wallace gives a detailed counter-example to refute Poulton's argument, arguing that "really beautiful combinations of colour and marking" are found on the sea shells of molluscs "where sexual selection has certainly not come into play".
Evidence for this strategy has hereto only been found in some corals, plants, molluscs, sea urchins and possibly basal fish [ 5], which all exhibit growth throughout life.
