(Mobius, 1875)

Description
Body narrow, head small and not much broader than the neck. Hooks 7-9, colourless and with a curved tip, serrated in juveniles. One pair of lateral fins, beginning at the level of the ventral ganglion onto about one third of the tail segment. Fins are partially rayed. No collarette and alimentary diverticula. Gut colourless, with oil droplets. Eyes not pigmented. Teeth 2-26, short and in one row.
Ovaries narrow, reaching to about half the length of the trunk; ova rather small. Developing eggs are carried in marsupial (brood) sacs, that hang each side from the opening of the oviduct. Seminal vesicles elongated, close to lateral fins.

Size
Maximum body length 43 mm, relative tail length 19-25%.

Distribution in the North Sea
All North Sea (Off North Scotland, North East Atlantic).

Depth range
Epi- to bathypelagic, regulated by temperature.

World distribution
Bipolar distribution with tropical submergence: epipelagic in high latitudes, meso- to bathypelagic at low latitudes.

[After Pierrot-Bults and Chidgey, 1988]

Kingdom Animalia
Phylum Chaetognatha
Family Eukrohniidae
Genus Eukrohnia
Species Eukrohnia hamata

Status in World Register of Marine Species

Accepted name: Eukrohnia hamata (Möbius, 1875)

Scientific synonyms and common names

Sagitta hamata | Mobius, 1875
Krohnia hamata | Fowler, 1905
Eukrohnia richardi | Germain and Joubin, 1912, 1916

Pierrot-Bults, A.C. and K.C. Chidgey, 1988. Chaetognatha. Synopses of the British Fauna (New Series), No. 39. Brill/Backhuys, London.

For further info about Eukrohnia hamata, you can also look up this species under:

You can continue searching for Eukrohnia hamata on one of these Web sites:

Fauna Europaea (animals) | IOPI (plants) | NCBI (genetic)

Google | Yahoo | MSN | Wikipedia