Fuchsia Flatworm　アデヤカニセツノヒラムシ

Fuchsia Flatworm (Pseudoceros ferrugineus) アデヤカニセツノヒラムシ
Small colorful look a little like nudibranchs they are flatworms. They are also carnivorous, and prey on even smaller invertebrates.　Amami 2024