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Anglerfish occur worldwide. Some are pelagic (dwelling away from the sea floor), while others are benthic (dwelling close to the sea floor). Some live in the deep sea (such as the Ceratiidae), while others live on the continental shelf, such as the frogfishes and the Lophiidae (monkfish or goosefish).
Based on these criteria, many fish species have been observed sleeping. [1] The typical sleep posture of the brown bullhead is with the fins stretched out, the tail lying flat on the bottom, the body inclined to one side at an angle of 10-30 degrees to the vertical, the cardiac and respiratory frequencies much slower than normal, and much less ...
They are small freshwater fish found in the dark environments of caves (underground lakes, pools, rivers and streams), springs and swamps in the eastern half of the United States. Like other troglobites , most amblyopsids exhibit adaptations to these dark environments, including the lack of functional eyes and the absence of pigmentation .
According to the organization, the fish is a so-called "black seadevil" known by its scientific name Melanocetus johnsonii. They typically swim between 650 and 6,500 feet below the ocean's surface.
The eyes of black seadevils are small; the pupil is larger than the lens, leaving an aphakic space. Common among deepsea anglerfish is the strong sexual dimorphism in melanocetids: while females may reach a length of 18 cm (7 in) or more, males remain under 3 cm (1 in). Aside from jaw teeth, males also lack lures. Pelvic fins are absent in both ...
Lobotes surinamensis, Rio Grande do Sul, Brazil. The Atlantic tripletail (Lobotes surinamensis), also known as the black grunt, black perch, buoy fish, buoyfish, brown triple tail, brown tripletail, conchy leaf, dusky triple-tail, dusky tripletail, flasher, sleepfish, triple tail, triple-tail, tripletail, or tripple tail is a species of marine ray-finned fish belonging to the family Lobotidae.
The eyelight fish is a small, dark fish, with a relatively stout body for an anomalopid. It has a blunt snout, large eyes, and prominent subocular light organs. It has a single dorsal fin and no adipose fins. It has 2–3 dorsal spines, 16–20 dorsal rays, 2 anal spines, and 13–15 anal soft rays.
Chaunax sea toads have a rotund, slightly laterally flattened body which tapers to a small rounded caudal fin. The head is large and globelike with a large oblique mouth and eyes set high on the head. The eyes are covered in transparent skin, resembling a window. The teeth in the mouth are vertical, small, thin, and sharp.
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