Sea elephant - Sea elephant

...They lay strings of yellow-orange eggs in bundles between seaweed or under rocks between March and July. These are called sea elephants, and turn brown as they develop. The closely related A. parvula is small, about 5cm long, with black edges on the parapedal lobes and also produces purple juice.

*Some of the terminology that mentions "Umizoumen" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…3～7月ごろ海藻の間や岩れきの下に黄橙色のひも状の卵塊を束ねて産む。これをウミゾウメンと呼び，発生がすすむと褐色になる。近縁のクロヘリアメフラシA.parvulaは小型で5cmくらい，側足葉の縁が黒色でやはり紫汁を出す。…

※「ウミゾウメン」について言及している用語解説の一部を掲載しています。

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