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Nudibranchs (NUDE i branks), shell-less members of the phylum Mollusca, class
Gastropoda, feed on soft corals. Their name means "naked gills" and the feathery
plumes on the dorsal side of the body are just that. These animals need shells ...
When it encounters a snail, the owl limpet raises its shell and then drops it quickly
, catching a portion of the snail's muscular foot. The snail will attempt to retreat
into its shell and at this point the limpet releases its hold, causing the now ...
This large invertebrate has evolved a reduced shell: only a small remnant
remains beneath the fleshy mantle. Despite the absence of a shell, the sea hare
has an effective defensive behavior. When alarmed or frightened, it will release a
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