Practice JLPTMeaning
赤貝 (あかがい, akagai) is Ark shells — a Japanese food (water animals).
What is Ark shells?
Akagai ( Anadara broughtonii ) are ark shells, also known as “bloody shells” not only because of the deep reddish-orange colour, but also because of the reddish water that looks like blood it gives off upon opening.