How do oysters reproduce?
358278
Some are hermaphroditic and self-fertilize their eggs, which they keep in their gills even after hatching until the young bear shells. Others are heterosexual and spew out eggs and sperm which unite and produce independent larvae that swim for a few weeks and then settle on a substrate. See ref.
551584
The only one I can think of is the shellfish called mussels.\n\nThese links should help you figure it out.
1184651
They only hold the eggs in a special sac, until they hatch.  (I think seahorses are egglayers.)  Once the young seahorses are ready to lead independent lives, he dumps them out of the sac.\n\nI think it is comparable to the way male emus incubate the eggs of their partners.  Male emus (an Australian bird, similar to the ostrich and rhea) also cares for the young; they follow him, for a while after hatching.\n\nSee?  The females lay eggs / give birth, really.  These males just participate in care of their offspring.  Their babies are thus more likely to grow up and have offspring; the trait has selective advantages.\n\nIn general, females put a lot more into young than males do.  In some species, the way "female" is distinguished from "male" is by comparing the size of their gametes.  Note how sperm are smaller than ova, for example.  In many cases, the female adds a huge load of nutrients to the young, too; the yolk + / or white of the egg, the placental nutrition of the foetus, the milk of mammals...  It all weakens the females, in cases where nutrients are limiting (which is the normal situation, "in the wild".\n\nIn cases where males take on the bulk of after - care, it just evens the load a bit, really.  It lets the females get back to replenishing their body nutrients, to get ready for the next brood.... probably sired by the same male.  (He wins again.)
914597
Asexual reproduction is the reproduction of a single individual without the use of sex.  Sex is defined as the halving of the chromosome number of an individual and its subsequent reconstitution at the fusion of the gametes (egg and sperm).  \nBasically asexual reproduction creates the clone of an individual as one individual copies its own genome and then splits into two individuals.\n\nBacteria and Archaeans (so all prokaryotes) reproduce only by asexual reproduction.  Also sponges have the ability to produce a full individual if one individual is broken into two pieces, which is called regeneration.  Also sea stars, sea anenomes, flatworms (etc.) are able to reproduce asexually by regeneration.
173897
Husbands.  (haha) \nI believe female octopusses (what IS the plural? Octopi?) only mate once in their lives. They die caring for their babies.\nMany animals are seasonal and only have one litter a year, depending on the climate.
432140
They produce eggs and sperm which they secrete into the water.  They then mix to fertilize the eggs.  They never actually come in direct contact with one another.
328719
sea-horse:  the male fertilizes the female eggs.  She pops them out.  He puts them in a pouch.  Then when they're ready, they exit his pouch.
475035
they lay eggs in clusters! many of them. and yes..they do have some sort of sex but not the version that you have in your mind.
509699
They vary as widely as the body plans of different mollusks, but basically there are both macrophagous (herbivores and predators) and microphagous (suspension feeders) forms.\n \n**Gasteropods (snails and slugs) are mainly herbivorous; they use their radula to scratch plant tissues. However, there are also predatory snails (with modified radula, or proboscis, or even a venom-injecting radula). There are also microphagous planktonic forms (pteropods).\n**Cephalopods (squids, octopi and their relatives) are predatory carnivores, they have a modified radula and a horny "beak" with which they eat different invertebrates and vertebrates.\n**Bivalves (clams, mussels, oysters, etc) are primarily microphagous or suspension (filter) feeders. They don't have a radula and rely on their modified gills for filtration. There are also some primitive detritivores among the bivalvians.\n**The chitons (Polyplacophora) are grazing herbivores (with  radula).\n**The Scaphopoda (tusk shells) capture small food items (particulate matter) with their tentacles (captacula).\n**Other less known mollusks include the caudofoveatans (these capture foraminiferans and other very small organisms from sediments), solenogasters (these eat corals) and monoplacophorans (with a radula, but not much is known about their ecology).
973149
Asexual reproduction  as opposed to the sexual reproduction you and I know..  Usually happens in bacteria through a process known as binary fission.
753339
In zoology it refers to organisms which have two distinct morphologic forms, where the offspring of each form is the opposite form. Typically one of the forms reproduces sexually, the other asexually. For example, some coelenterates have a free-swimming medusa (jellyfish-like) stage, and a sessile polyp (anemone-like) stage. The mature polyps reproduce asexually by budding off medusae. The medusae once mature reproduce sexually, shedding gametes into the water, and the resulting embryos settle to the bottom, attach to the substrate, and grow into polyps, which once mature produce more medusae ...
1172959
Many species of algae reproduce sexually and asexually.    Sexual reproduction in algae is often triggered by environmental stress\n\nDuring asexual reproduction, the algae first absorbs its flagellum, then the haploid cell divides mitotically up to three times, and from two to eight haploid flagellated cells called zoospores develop within the parent cell, lastly, the asexual reproductive cells break out of the parent cell, disperse, and eventually grow to full size. \n\nSexual reproduction begins by haploid cells dividing mitotically to produce either “plus” or “minus” gametes. A plus gamete and a minus gamete come into contact with one another and shed their cell walls, then they fuse and form a diploid zygote, which develops a thick protective wall; this resting stage of a zygote is called a zygospore.  A zygospore can withstand bad environmental conditions; during the bad environmental condition, the thick wall opens and the living zoospore emerges.\n\nyou can also refer following link to have more details.\n\nhttp://io.uwinnipeg.ca/~simmons/16labman05/lb1pg8.htm\n\nHope this helps!!!
24184
Yes some plants and animals are farmed in the oceans. Sea weed such as kelp and many shell fish such as oysters and mussles are being farmed today. There are also hatcheries. These are places where some fish are born then let loose in the wild where they return to spawn. Some hatcheries raise fish till they are old enough to "harvest", then put to market.
367063
The sperm and egg (1n) come from the gametophyte through mitosis. After fertilization, the zygote grows into a sporophyte (2n). The sporophyte creates spores (1n) by meiosis which grows into a gametophyte (1n). It's a cycle! Hope this helps!
1027564
Not all pearls are spherical.\n\nPearls are formed when a piece of sand or grit gets trapped inside an oyster's shell.  To prevent this from irritating the oyster's soft tissues, the oyster covers it in layers of a smooth white substance, adding layer upon layer.  As more layers get added, the lump becomes larger and smoother, eventually creating a pearl.
605125
Only if the oyster is under age. Otherwise the relationship is pearlfectly legal.
1020949
During mating season, males may court a female by nuzzling her head or by gently biting the back of her neck and rear flippers. If the female does not flee, the male attaches himself to the back of the female's shell by gripping her top shell with claws in his front flippers. He then folds his long tail under her shell to copulate. \n\nFemales observed on the nesting beach after recently mating often have scratched shells and may be bleeding from where the males' were hooked to their shells. Copulation can take place either on the surface or under water.