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The upper jaw, or maxilla [12] [13] is a fusion of two bones along the palatal fissure that form the upper jaw. This is similar to the mandible (lower jaw), which is also a fusion of two halves at the mandibular symphysis. In bony fish, the maxilla is called the "upper maxilla," with the mandible being the "lower maxilla".
In most species, the upper jaw reaches its full length only in adults, so the juveniles have a half-beak appearance, with an elongated lower jaw, but a much smaller upper one. During this stage of their lifecycle, they eat plankton, switching to fish once the beak fully develops. Needlefish reproduce through mating and laying eggs.
The video above, filmed by the Monterey Bay Aquarium Research Institute (MBARI), provides an amazingly close view of this odd-looking fish as it swims deep in the ocean.
Dunkleosteus is an extinct genus of large arthrodire ("jointed-neck") fish that existed during the Late Devonian period, about 382–358 million years ago.It was a pelagic fish inhabiting open waters, and one of the first apex predators of any ecosystem.
Monognathus, or onejaw, is the only genus of the family Monognathidae of deep-sea eels.The name comes from the Greek monos meaning “one” and gnathos meaning “jaw”, a reference to the large mouth in comparison with the rest of the fish, and also the absence of an upper jaw (maxilla and premaxilla bones are absent).
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Most oceanic species (78 per cent, or 44 per cent of all fish species), live near the shoreline. These coastal fish live on or above the relatively shallow continental shelf. Only 13 per cent of all fish species live in the open ocean, off the shelf. Of these, 1 per cent are epipelagic, 5 per cent are pelagic, and 7 per cent are deep water. [16]
Zoombezi Bay (/ z uː m ˌ b iː z i ˈ b eɪ /) is a 22.7-acre (9.2 ha) water park owned by the Columbus Zoo and Aquarium near Powell, Ohio just north of Columbus.The park sits on the site of the former Wyandot Lake Adventure Park, which was purchased by the Columbus Zoo and Aquarium in 2006.