Fish

Icefish

Family Channichthyidae

PacificAtlanticIndianSouthernArctic A single ocean

Southern Ocean, around Antarctica, a single species off Patagonia

Depth

Surface to about 2,000 m (Southern Ocean)

Size

About 25 to 70 cm depending on the species

Diet

Krill, fish

Zone

Twilight zone · 200 – 1,000 m

Key facts

• It is the only adult vertebrate without hemoglobin: its blood is almost transparent.
• Icy, oxygen-rich water, a large heart and a lot of blood allow it to do without it.
• Antifreeze proteins keep its blood from freezing.

Verified sources

1. FishBase – Chionobathyscus dewitti
2. FishBase – Chaenocephalus aceratus
3. Wikipedia – Channichthyidae
4. WoRMS, Channichthyidae

In the game: To observe

In the same zone

Boreoatlantic armhook squidGonatus fabricii Antarctic toothfishDissostichus mawsoni Glacial squidPsychroteuthis glacialis Antarctic silverfishPleuragramma antarctica Big red jellyfishTiburonia granrojo Leafscale gulper sharkCentrophorus squamosus