Argyropelecus hemigymnus explained

Argyropelecus hemigymnus, the half-naked hatchetfish, short silver hatchetfish or spurred hatchetfish, is a deep-sea hatchetfish of the genus Argyropelecus found mesopelagically in the Atlantic, Indian, and Pacific Oceans as well as in the Mediterranean Sea. It is a small species rarely exceeding standard length.^[1] It feeds on zooplankton, particularly ostracods and copepods.^{[2] [3]} Sexual maturation occurs at length of about 22 mm, and adult males have more developed olfactory organs than females, i.e. the species is sexually dimorphic.^[4]

Notes and References

1. 142. 1–128. Baird. R. C.. The systematics, distribution, and zoogeography of the marine hatchetfishes (family Sternoptychidae). Bulletin of the Museum of Comparative Zoology. 1971.
2. Merrett . N. R. . Roe . H. S. J. . 10.1007/BF00396302 . Patterns and selectivity in the feeding of certain mesopelagic fishes . Marine Biology . 28 . 2 . 115 . 1974 . 1974MarBi..28..115M . 84296943 .
3. 36. 2. 260–277. Hopkins. Thomas L.. Ronald C. Baird. Feeding ecology of four hatchetfishes (Sternoptychidae) in the eastern Gulf of Mexico. Bulletin of Marine Science. 1985.
4. 47. 561–566. Baird. R. C.. G. Y. Jumper. E. E. Gallaher. Sexual dimorphism and demography in two species of oceanic midwater fishes (Stomiiformes: Sternoptychidae) from the eastern Gulf of Mexico. Bulletin of Marine Science. 1990.