algae octopus (Abdopus aculeatus)
A species of octopus known for its long arms and cryptic behavior. The name literally means 'long-armed hiding octopus'.
The algae octopus is often found in tide pools.
Katakana spelling is standard for this species name; usually written in kana.
Kanji spelling is rare and mostly found in older or specialized literature; the katakana form is strongly preferred.
Compound of 腕長 (udenaga, 'long-armed') + 隠れ (kakure, 'hiding') + 蛸 (tako, 'octopus'). The name describes the octopus's long arms and its habit of hiding among algae and rocks.