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Characteristics, distribution and ecology
Taxonomische classification
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Most members of this subclass lack an external shell, although several orders have reduced-external, or poorly developed internal, shells. The body is typically a thick, elongated oval. The mantle, which often has colorful, ornate designs, covers the animal's back. At the head are one or two pairs of tentacles; some have foot corner extensions that appear as an additional pairs of tentacles.

The following taxa of this subclass occur in the region:

Aplysia dactylomela (Spotted sea hare)
Tridachia crispata (Lettuce sea slug)

Shell-less snails (Subclass Opistobranchia)