Sea Hare
Aplysia, the name of a genus of gasteropodous mollusca. These animals are slug-like in appearance, and derive their popular name from the prominent character of the front pair of tentacles, which somewhat resemble the ears of a hare. The shell is either absent or is of very rudimentary character, and is concealed by the mantle. Four tentacles exist, and the eyes are situated at the base of the hinder tentacles. The sea hares are widely distributed throughout most seas, and generally inhabit muddy or sandy tracts. They emit a fluid of a rich purple hue. They are also known to discharge an acrid fluid of milky appearance, which has an irritant effect on the human skin. A. hybrida is the common British species.