New Jersey Scuba Diving

Mud Dog Snail

Nassarius spp

Size: to 1"

Habitat: intertidal to shallows, on muddy bottoms

Notes:

This scavenger is often found on dead fish and other animals.

Snails

These creatures are all of the order Gastropoda - having a single, often coiled, shell, as opposed to the bivalves, which have two matching shells. Most snails are hermaphroditic. Also, most snails have a right-hand twist to the shell, although there are exceptions.

Right:
X-ray image of a Channeled Whelk, showing internal structure.

Nudibranchs are a form of snail that has lost its shell, while Corollas and Sea Butterflies are snails that have abandoned not just their shells, but the snail-like existence entirely, swimming up into the water column as plankton.

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Collecting Mussels

Mussels are easy. they grow almost everywhere - on any hard surface. They are the lawn grass of the sea. All you have to do is pluck them and put them in your bag. Don't waste a lot of time selecting them individually underwater. Just grab big clumps as fast as you can, and stuff them in your bag. Sort them out topside later, when your nitrogen clock isn't running. Take more than you think you'll want because you will end up discarding a lot of what you take this way.

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