Costasiella formicaria (Baba, 1959)

オオアリモウミウシ Costasiella formicaria
Photographed by
kamendiver オミ@教導潜水漢
Location
, Hamanako, Higashiizu, Japan
Date
2023/01/13
Length
10mm
Depth
2.3m
Water temperature
16.8℃