Upper preopercular spine short, extending little, if at all, beyond posterior edge of preopercle; lower preopercular spine short, curving outwards and ventrally, its length always less (usually less than …

(5) There are 12 PV photophores in all spe- cies of Argyropelecus. A similar number occurs in Maurolicus muelleri. The immediate outgroup genera, Argyripnus, Polyipnus, Sonoda, and Ster- …

This shape, alongside the counterillumination provided by the well-developed ventral photophores, reduces the silhouette of the fish when viewed from beneath, concealing it from potential predators.

Elongate compressed body; photophores and sequence of development (~6-10 mm SL): lower OP, BR, posterior IV, anterior IV, posterior AC, anterior AC, OA, ORB, and VAV; SAB, PAN, AN, and SC …

Feb 19, 2025 · Argyropelecus gigas Norman 1930 gígas (Gr. γίγας), giant, the largest marine hatchetfish, described at 87 mm SL (but reaching 110 mm)

The entire luminous system was made up of 138 photophores, all facing downwards with the exception of the cephalic photophores facing obliquely.

Many photophores are present on the flanks of Argyropelecus lychnus (silvery hatchetfish), 6 cm. There are about 27 species, distributed world-wide at depths of 100–4000 m.

May make short diel migrations (Ref. 4739). Smaller individuals feed on copepods and ostracods; larger ones feed on euphausiids, salps and chaetognaths (Ref. 4739). Adult complement of photophores …

One of the distinguishing characters of the genus Argyropelecus is the presence of a bony blade in front of the dorsal fin. Hatchetfishes are deepsea fishes which have upward-directed eyes and light …

Adult Argyropelecus affinis feed on planktonic organisms, salps, krill, arrow worms, copepods and ostracods. Smaller fish consume mainly copepods and ostracods, and their adult arrangement of …