| A free-swimming roundworm thus looks rather like it is thrashing about aimlessly. |
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| Swimmer's itch is caused by a free-swimming parasite that burrows into and irritates the skin of humans. |
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| The free-swimming tadpoles produced by sexual reproduction live only a few days, during which time they can be spread by tidal and storm currents to form new colonies. |
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| There are more than a thousand described species of golden algae, most of them free-swimming and unicellular, but there are filamentous and colonial forms. |
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| These are miniature jaw-like structures that come from a free-swimming worm-like animal, actually more closely related to fishes than to any of the other invertebrates. |
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| American lobsters have a complex life cycle that involves a 3-10 week free-swimming larval stage in surface water. |
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| The eggs of most frogs hatch into aquatic, free-swimming larvae, commonly known as tadpoles. |
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| This suggests that ISMN induces the transition of sessile biofilm cells to free-swimming planktonic cells. |
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| These streams resulted in forward swimming along the posterior-anterior axis in free-swimming spheroids. |
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| Most animals are mobile to some extent, and a great many of the sessile varieties have a free-swimming larval stage. |
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| Variations in these factors are presumably more easily tolerated by the free-swimming juveniles and adults. |
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| These tiny free-swimming fish maintain a nearly vertical position in the water on their journey upwards. |
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| The larvae are free-swimming during approximately four weeks before metamorphosis and settlement of the spat on a suitable benthic substrate. |
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| The larvae are free-swimming for a period of four to five weeks, after which metamorphosis and spat settlement occur. |
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| Once the nutrients in the sac are absorbed, the free-swimming fry must move up into the water and face a dangerous world. |
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| Zooplankton are microscopic free-swimming organisms that consume Phytoplankton and themselves are food for larger invertebrates and fish. |
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| Consequently, during this period beached or free-swimming seal pups can be heard crying out. |
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| Fertilized eggs may be brooded for a time or may develop directly into a free-swimming, ciliated planula larva. |
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| Most marine bivalves go through a trochophore stage before turning into a free-swimming veliger larva. |
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| Oviparity with free-swimming larvae is the most common, but direct terrestrial development and viviparity are known in toads as well. |
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| Among the damaged coral we saw free-swimming moray eels, octopuses, and several anemones with their resident clownfish. |
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| The free-swimming larva settles and undergoes metamorphosis into a juvenile sponge. |
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| Not only do P. sinitsini become adults in E. symmetrica, but eggs are produced and hatch inside the daughter sporocysts, releasing free-swimming miracidia. |
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| The eggs need about 24 hours to be transformed into free-swimming larvae. |
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| Chemicals, usually in the form of short-chain fatty acids, or specific amino acids, which are released from the molluscan host, then attract the free-swimming miracidia. |
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| The eggs take about 20 weeks to hatch and the now free-swimming ray is still reliant upon its yolk sac for a few more weeks before it begins to feed upon shrimps. |
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| The body of an echiuran lacks annelid-type segmentation, but the distinctive free-swimming trochophore larval stages of echiurans and polychaetes are very similar. |
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| Larger individuals also take free-swimming crustaceans. |
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| Mr. Gordon Ennis: The juvenile stages of sea lice are free-swimming plankton, and so they would move like any other plankton species, and that would be with currents. |
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| However, the species can tolerate a wide range of temperatures and the free-swimming planktonic larvae can spend up to three weeks in the water column before finding a suitable substrate to settle on. |
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| As regards catches of small fish, the ever more popular practice of setting purse seines on FADs, rather than free-swimming schools of tuna, has led to high exploitation of juvenile tuna. |
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| Jellyfish: A jelly-like, free-swimming sea animal with a bell-shaped body, and generally with long stinging threads on the surface. |
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| Many cichlids brood the eggs in the mouth and, although rare, the free-swimming young of some species also rush into the parent's mouth for protection. |
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| Fern gametes are free-swimming and a thin film of water is required for the male gametes to travel from the antheridia into the neck of the archcgonia to fertilize the eggs. |
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| Abalone larvae are free-swimming and use tiny hair-like cilia to propel themselves through the water. |
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| A free-swimming tunicate larva metamorphoses into an attached, sessile adult with an atrium that surrounds the gills. |
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| It is the region inhabited by plankton, which are minute organisms that drift or float at various depths in the water, and by nekton, which are free-swimming organisms. |
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| The free-swimming fish seem to congregate annoyingly at the thermocline, where the oily effect of mixing water makes them appear constantly out of focus. |
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| In addition to polluting microbes, ocean waters sometimes have free-swimming organisms that cause swimmer's itch, as well as the stinging cells of jellyfish. |
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| Locomotory behaviour and post-exercise physiology in relation to swimming speed, gait transition and metabolism in free-swimming smallmouth bass. |
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| The cercaria is a free-swimming larval stage that may become caught in the respiratory current of a fish, the second intermediate host to the parasite. |
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| Free-swimming larvae of land crabs eat plankton in the ocean. |
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