Aplysia kurodai (rain tiger) - Aplysia kurodai (English spelling)

Japanese: アメフラシ(雨虎) - アメフラシ（英語表記）Aplysia kurodai

A black, slug-shaped snail of the Aplysia family with a severely degenerated shell that is commonly found among seaweed on rocky coasts in spring (illustration). It is found throughout Japan, the Korean peninsula, China, and Taiwan. Its body length is usually around 15cm, but some can reach 40cm. When stretched out, its body is elongated and oval, tapering toward the front, with a black body covered in small grayish white spots, but there is considerable individual variation. It has a pair of anterior and posterior antennae (olfactory horns) on its head. The former are large and shaped like rabbit ears, which is why Aplysia is called sea hare in English.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

春季，海岸の岩れき地の海藻の間にふつうに見られる殻が著しく退化した黒いナメクジ型のアメフラシ科の巻貝（イラスト）。日本各地，朝鮮半島，中国，台湾に分布。体の長さは通常15cmくらいであるが，大きいのは40cmに達する。体をのばすと長卵形，前方へ細くなり，黒色に小さい灰白斑が全面にあるが，個体変異が著しい。頭には前触角と後触角(嗅角（きゆうかく）)が各1対ある。前者が大きく，その形がウサギの耳のようなのでアメフラシを英名ではsea hareという。

出典　株式会社平凡社世界大百科事典第２版について　情報

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