New Jersey Scuba Diving

Common Tern

Terns are smaller and more graceful in flight than gulls. The Common Tern Sterna hirundo (right) grows to 14", wingspan 31". Their forked tails make it easy to differentiate terns from Laughing Gulls, which also have black heads.

Terns are found in the same habitats as gulls, that is to say, just about anywhere near water. Their call is a common sound along waterfronts everywhere.

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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Common Tern

Sea Birds

Snails