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' flat animals ') [3] is a phylum of free-living (non-parasitic) marine invertebrates. [4] [5] They are blob-like animals composed of aggregations of cells. Moving in water by ciliary motion, eating food by engulfment, reproducing by fission or budding, placozoans are described as "the simplest animals on Earth."
Once the podia has attached itself to the substrate, the longitudinal muscles of the podia constrict forcing that liquid back into the ampulla causing the podia to shrink and pulling the body in that direction, or food closer to the mouth. Tube feet that have been pulled off as the sea urchin is thrown around by the sea will quickly regenerate.
A chordate (/ ˈ k ɔːr d eɪ t / KOR-dayt) is a deuterostomal bilaterian animal belonging to the phylum Chordata (/ k ɔːr ˈ d eɪ t ə / kor-DAY-tə).All chordates possess, at some point during their larval or adult stages, five distinctive physical characteristics (synapomorphies) that distinguish them from other taxa.
Earlier this year, a team of researchers sent cameras down to the depths of the ocean. They likely didn't expect to see this creature swimming by. The Ocean Exploration Trust uploaded this video ...
The fish range in size from about 3.83 inches to about 4.86 inches long, the study said. They were collected from between approximately 630 feet underwater to about 985 feet underwater.
The seamoths make up a family of ray-finned fishes, the Pegasidae, within the order Syngnathiformes.They are named for Pegasus, a creature from Greek mythology.Seamoths are notable for their unusual appearance, including flattened bodies, the presence of large, wing-like, pectoral fins, a long snout, and a body encased in thick, bony plates.
The underside of the gumboot chiton, Cryptochiton stelleri, showing the foot in the center, surrounded by the gills and mantle: The mouth is visible to the left in this image. The mouth is located on the underside of the animal, and contains a tongue-like structure called a radula, which has numerous rows of 17
The initiation of copulation begins when the male catches a female and wraps his arm around her, either in a "male to female neck" position or mouth to mouth position, depending on the species. The males then initiate the process of fertilization by contracting their mantle several times to release the spermatozoa. [ 117 ]