Costasiella formicaria (Baba, 1959)

オオアリモウミウシ Costasiella formicaria
Photographed by
umimogu 高屋 誠
Location
Tatunokuti, Nagasaki, Japan
Date
2017/04/01
Length
5mm
Depth
5.0m
Water temperature
14.0℃