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Species of the family Trochidae are dioecious, and the fertilization occurs externally by the release of eggs and sperm. [3] Top snail eggs are laid individually or in gelatinous egg masses in the water. Individuals may hatch as free-swimming planktonic larvae or juvenile crawlers with a short swimming stage. [3]
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]
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 ...
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 ...
Egg laying and the eggs of gastropods; The embryonic development of gastropods; The larvae or larval stadium: some gastropods may be trochophore and/or veliger; Estivation and hibernation (each of these are present in some gastropods only) The growth of gastropods
The egg masses of Pomacea canaliculata are a bright pink or orange in color Eggs of Pomacea canaliculata, scale bar in cm (25 ⁄ 64 in). In temperate climates, the egg-laying period of this species extends from early spring to early fall. [22] while in tropical areas reproduction is continuous.
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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 ...