Arrow worm

Arrow worm

Phylum Chaetognatha

PacificAtlanticIndianSouthernArctic Found in all 5 oceans

All oceans, from tropical to polar waters

Depth

From the surface to the deep sea

Size

A few millimeters to 12 cm

Diet

Copepods, fish larvae

Zone

Twilight zone · 200 – 1,000 m

Key facts

• This small transparent predator seizes its prey with hooks around its mouth.
• Many paralyze their prey with a neurotoxin, tetrodotoxin.

Verified sources

1. Animal Diversity Web, Chaetognatha
2. WoRMS, Chaetognatha

In the game: To observe

In the same zone

Giant ostracodGigantocypris sp. PhronimaPhronima sedentaria Giant red mysidNeognathophausia ingens TomopterisTomopteris sp. BristlemouthCyclothone sp. Black scabbardfishAphanopus carbo