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This resulted in a strain of fish soon to be known throughout the world as Philadelphia veiltails. [1] [2] [5] Although some have suggested that Philadelphia Veiltails died out in America, [6] a man named Al Thomma was able to obtain stock from a John (Andy) W. Anderson of Philadelphia who possessed fish from the original Barrett line. [7] Mr.
Fish tails are usually vertical and move from side to side. Cetacean flukes are horizontal and move up and down, because cetacean spines bend the same way as in other mammals. [92] [93] Similar adaptations for fully aquatic lifestyle are found both in dolphins and ichthyosaurs. Ichthyosaurs are ancient reptiles that resembled dolphins. They ...
Most fish have a homocercal tail, but it can be expressed in a variety of shapes. The tail fin can be rounded at the end, truncated (almost vertical edge, as in salmon), forked (ending in two prongs), emarginate (with a slight inward curve), or continuous (dorsal, caudal, and anal fins attached, as in eels).
Unlike many other electrogenic fishes, skates are unique in having paired electric organs which run longitudinally through the tail in the lateral musculature of the notochord. [14] The impulses put out by the electric organs of the skate are considered to be weak, asynchronous, long-lasting signals. [ 15 ]
Bat rays feed on mollusks, crustaceans and small fish on the seabed, using their winglike pectoral fins to move sand and expose prey animals. They may also use their snout to dig trenches up to 20 cm deep to expose buried prey, such as clams. [23] [24] Bat rays create pits by excavating the substrate in order to feed upon invertebrates and ...
Tail large caudal fin whose primary function is to provide main forward propulsion varies from thick tail as extension of body to a whip that can sting to almost no tail. Locomotion: swim by moving their tail from side to side Guitar fish and sawfish have a caudal fin like sharks swim by flapping their pectoral fins like wings
Yellowtail snapper have a distinct yellow lateral band beginning at the snout that gets wider towards the forked tail, which is completely yellow. The rest of the fish is an olive to bluish black color with yellow spots above the lateral band. [8] [9] The dorsal fin is yellow while the anal and pelvic fins are whitish. [10] by bony spines. The ...
The term "eel" is also used for some other eel-shaped fish, such as electric eels (genus Electrophorus), swamp eels (order Synbranchiformes), and deep-sea spiny eels (family Notacanthidae). However, these other clades , with the exception of deep-sea spiny eels, whose order Notacanthiformes is the sister clade to true eels, evolved their eel ...