(Grassi, 1881)

Description
Body thin and transparent, with a very small head not much broader than the neck. One pair of lateral fins, broad and with fin rays only at the outer edge. Fins situated on both trunk and tail segment. Collarette and alimentary diverticula absent. Small eyes with round pigment spot. Hooks 6-9, strong. Teeth 10-13, triangular and in one, very prominent row, covering the anterior of the head.
Ovaries short, broad, with large ova. Seminal vesicles elongate, situated between lateral and tail fins.

Size
Maximum body length 16 mm, relative tail length 30-40%.

Distribution in the North Sea
Likely to be absent from the North Sea. The species is found near the northern entrance of the North Sea (S. Hay, pers. com.).

Depth range
Epipelagic, oceanic species.

World distribution
Cosmopolitan species of warm and temperate regions.

[After Pierrot-Bults and Chidgey, 1988]

Kingdom Animalia
Phylum Chaetognatha
Family Eukrohniidae
Genus Krohnitta
Species Krohnitta subtilis

Status in World Register of Marine Species

Accepted name: Krohnitta subtilis (Grassi, 1881)

Scientific synonyms and common names

Sagitta subtilis | Grassi, 1881
Krohnia subtilis | Fowler, 1905
Eukrohnia subtilis | Michael, 1911

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

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