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Astyanax angustifrons is usually within the range of 23 cm (9 in) SL (standard length). [10] It has 34 to 38 scales in the lateral line, 11 dorsal-fin rays, and 26 to 29 anal-fin rays; the origin of the dorsal fin is behind the base of the ventral fins. [11]
The flattened head and body of various fishes such as stingrays, which also commonly includes the pectoral and ventral fins. distal Remote from the point of attachment. dorsal Pertaining to the back. dorsum The upper (dorsal) surface of the head or body. dorsal fin The fin on a fish's back. dorsal fin origin The most anterior point of the ...
The pelvic fin assists the fish in going up or down through the water, turning sharply, and stopping quickly. In gobies, the pelvic fins are often fused into a single sucker disk. This can be used to attach to objects [1] Pelvic fins can take many positions along the ventral surface of the fish.
The caudal fin, which connects directly to the dorsal fin, is the fish's primary means of propulsion. Although not a particularly fast species, P. bichir lapradei is capable of achieving quick bursts in pursuit of its prey (usually by folding all of its fins tightly against its body, and vigorously thrusting its caudal fin).
Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral fins). The pelvic fins are homologous to the hindlimbs of tetrapods, [1] which evolved from lobe-finned fish during the Middle Devonian.
Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3]
The pectoral fins are nearly transparent and pinkish in colour while the pelvic fins are whitish with a yellow axillary scale. The caudal fin is pink with its upper tip and filament being yellow. [5] The maximum published total length of this fish is 34 cm (13 in), although 25 cm (9.8 in) is more typical. [2]
Copadichromis borleyi is a species of haplochromine cichlid fish endemic to Lake Malawi in East Africa. [3] The species is popular in the fishkeeping hobby where it is frequently kept in aquariums. [4] [5] The species has numerous common names, including redfin and goldfin hap. [3] [5]