noun
Asclepios shiranui (species of pond skater)
A specific species of marine water strider found in coastal areas of Japan.
干潟でシオアメンボを見つけた。
I found an Asclepios shiranui on the tidal flat.
アメンボ is the general term for pond skaters or water striders, while シオアメンボ refers specifically to the marine species Asclepios shiranui.
Compound of 塩 (shio, 'salt') and アメンボ (amenbo, 'pond skater'), referring to its habitat in saltwater environments.