Collected around 250m off the coast of Ibaraki Prefecture.Since 25, the museum has been collecting them on board the Ibaraki Prefectural Fisheries Experimental Station research vessel "Ibaraki Maru", but so far only this one individual has been confirmed, making it a very rare creature.As the name suggests, don't you think it's somewhat similar to "Matsukasa"?Please take a look at the mysterious appearance of the branch-like tentacles.Although it looks like this, it is actually a member of the sea cucumber family.