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Hagfish embryos have characteristics of gnathostomes and may be plesiomorphic; [33] however, these characteristics drastically change morphologically as the hagfish matures. [33] The following hagfish and lamprey phylogeny is an adaptation based on the 2019 work of Miyashita et al. [ 69 ]
A related species, the Gulf hagfish (Eptatretus springeri), occurs in the Gulf of Mexico. [7]To distinguish these two types of hagfishes, we can look at their lateral line and eyes, the Myxine glutinosa has no lateral line system and also an unpigmented, cornea-like window in the skin overlying the eye.
The inshore hagfish is the only member of the Myxinidae family having a seasonal reproductive cycle. Generally very little is known about hagfish reproduction and embryos are difficult to obtain for study, although laboratory breeding of Eptatretus burgeri has succeeded.
The Pacific hagfish (Eptatretus stoutii) is a species of hagfish. It lives in the mesopelagic to abyssal Pacific Ocean , near the ocean floor . It is a jawless fish and has a body plan that resembles early Paleozoic fishes.
Close-Up of Nostrils of Lophelia Hagfish [2] Though not much is known about reproduction in this specific species, there is some description of reproduction in hagfish as a genus. At first, these fish were considered hermaphrodites, then dioecious, and it was not until more recently that they were found to develop specific gonads as juveniles ...
Myxine circifrons, the whiteface hagfish, is a marine bathydemersal species of fish in the family Myxinidae. It is found off Southern California , Peru , and Chile and grows to 65 centimetres (26 in) total length .
Sep. 13—The hagfish, a primitive fish that looks like an eel and scavenges off the ocean floor, dwells in cold, deep waters around the world—but not in Hawaii. Yet, for years, thousands upon ...
Eptatretus bischoffii is a common hagfish of the genus Eptatretus. Its maximum length is 55 centimetres (22 in). It lives in a demersal, non-migratory, marine habitat with its depth range between 8–50 m. It can survive in only temperate zones. These organisms are found in the South Pacific, mainly, Chile. It is harmless to humans.