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The large egg size indicates continuous egg laying in hadal snailfish; some species spawn their eggs among cold-water coral, kelp, stones, or xenophyophores, and the males will guard the egg sometimes. [17] Liparids have ventral sucking disk that is used to attach to king crab and deposits its eggs inside the carapace of the gills. [19]
Like other snailfish, they lack scales and have a loose gelatinous skin; a few species are covered in prickly spines. [ 2 ] Most species of Careproctus are poorly known, but they feed on small animals and some have unusual breeding behaviors: At least C. ovigerus appears to be a mouth brooder where the eggs are carried and develop in the males ...
Compared to shallow-water snailfish, Pseudoliparis swirei has several unusual adaptions for its dark and high pressure habitat, including transparent skin that lacks pigment, certain organs and eggs that are enlarged, the muscles are thinner, the ossification of its bones (notably the skull) is incomplete, it appears to have little or no ...
Species of deep-sea snailfish have been studied and compared to other ray-finned fishes (also known as teleosts) to analyze their adaptions to deep-sea conditions. The genomes of both the Yap hadal snailfish and Mariana hadal snailfish have been found to contain an abundance of the fmo3 gene, which produces the trimethylamine N-oxide (TMAO) protein stabilizer.
Careproctus ovigerus is thought to be a mouth brooder as the holotype, a male, was found to be carrying two developing eggs in his mouth.Two immature females of 18 cm (7 in) standard length had undeveloped ovaries containing many small eggs 1 mm (0.04 in) in diameter, while larger, mature females had fewer, large-yolked eggs in their ovaries, the egg being some 6 to 7 mm (0.24 to 0.28 in) in ...
The gonopore acts as an opening through which eggs are deposited. The opening leads into the mantle tubule, in which eggs flow from the oviduct and ovary. The mantle tubule produces three things, yolk; carries most of the nutrients needed to develop a healthy offspring, egg capsule formation, and sperm reception and storage; where fertilization ...
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The perivitelline fluid is an extracellular fluid found in the eggs of most gastropods and constitutes the main source of nutrition and defense for their embryos.It replaces the egg yolk of other animals, which in snail eggs is reduced to non-nutritive proteinaceous granules with putative enzymatic function.