Mertensia ovum (Fabricius, 1780)
Body red and/or purple in color; tentacles are red.
Body flattened on the sides; one of the axis is 3-4 times shorter than the other. Tentacles are tens of times longer than the body when extended; tentacle pouches are present.
Length up to 55 mm, width up to 45 mm, thickness up to 15 mm.
Ecology and Distribution
Cold-water species; circumpolar distribution. Found in most Arctic and sub-Arctic seas.
- Mertensia cucullus L. Agassiz, 1860 (synonym)