Creature reference

Giant isopod

Bathynomus spp. · 170–2,140 m

Reference answer

A large crustacean scavenger that feeds on animal falls and other food reaching the seafloor.

Adaptations

Slow metabolism
Armored body
Ability to exploit rare large meals

Depth zones

Twilight ZoneA dim global layer where enormous numbers of animals migrate upward at night and descend before dawn.Midnight ZoneThe largest continuously dark habitat, where food is scarce and animals rely on specialized senses, lures and low-energy strategies.

Evidence

Sources reviewed

Meet the Giant IsopodsSmithsonian Ocean · checked 2026-07-30