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A Male in an aquarium. Flagfish are small, robust fish, 6 centimetres (2.4 in) in length, with a truncated snout which has been compared to that of a bulldog.They have rounded fins with the dorsal and anal fins positioned posteriorly and adjoining the caudal fin.
The American paddlefish is a smooth-skinned freshwater fish with an almost entirely cartilaginous skeleton and a paddle-shaped rostrum (snout), which extends nearly one-third its body length. It has been referred to as a freshwater shark because of its heterocercal tail or caudal fin resembling that of sharks, though it is not closely related ...
Freshwater fish are fish species that spend some or all of their lives in bodies of fresh water such as rivers, lakes and inland wetlands, where the salinity is less than 1.05%. These environments differ from marine habitats in many ways, especially the difference in levels of osmolarity .
Eggs are laid in a gelatinous strand (commonly 10,000–40,000), a characteristic unique among North American freshwater fishes. Egg strands are commonly draped over weeds, the branches of submerged trees or shrubs, or some other structure. Eggs hatch in 11–27 days, depending on temperature and other abiotic factors. [14]
Phylogenetic analyses expressed that the common ancestor of Etheostomatinae buried eggs with the help of tube-like appendage with a genital pore, a pore that releases the females eggs, held at the dorsal-posterior end known as tube papillae, leading researchers to believe this is the ancestral state of darters.
The belly is off-white or cream, and the fish has no scales. [5] Additionally, there are darker, brown-black speckles along the entire surface of the fish. The brown bullhead has a dorsal fin that bears a spine, [6] a single adipose fin posterior to the dorsal fin, abdominal pelvic fins, and an anal fin with 21 to 24 rays. The tail is only ...
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Lepomis or true sunfish is a genus of North American freshwater fish from the family Centrarchidae in the order Perciformes (perch-like fish). The generic name Lepomis derives from the Greek λεπίς ("scale") and πῶμα ("cover", "plug", "operculum"). The genus' most recognizable species is perhaps the bluegill.