noun
man-of-war fish
A small fish (Nomeus gronovii) that lives among the tentacles of the Portuguese man-of-war.
エボシダイはカツオノエボシの触手の間で暮らしている。
The man-of-war fish lives among the tentacles of the Portuguese man-of-war.
Named after the eboshi (烏帽子), a traditional black hat, because the fish's shape resembles it. 鯛 (たい) means sea bream, though it is not a true bream.