negatively buoyant cartilaginous fish. By contrast, most bony fish possess a homocercal caudal fin. Tiger sharks have a large upper lobe, which allows for slow...

negatively buoyant cartilaginous fish. By contrast, most bony fish possess a homocercal caudal fin. Tiger sharks have a large upper lobe, which allows for slow...

be heterocercal, reversed heterocercal, protocercal, diphycercal, or homocercal. Heterocercal: vertebrae extend into the upper lobe of the tail, making...

and are typically identifiable by their fins. They ordinarily possess a homocercal caudal fin (a twin-lobed, or forked, tail fin whose upper and lower lobes...

Teleosts can be distinguished from other bony fish by their possession of a homocercal tail, a tail where the upper half mirrors the lower half. Another difference...

role in grinding food in addition to transporting it. The caudal fin is homocercal, meaning the upper and lower lobes are about equal in size. The spine...

fin spine, and a tall, forked caudal fin which externally appears to be homocercal (with two equally-sized lobes). This general body plan is shared by active...

also has typical features of primitive Cypriniformes fishes, such as a homocercal tail, cycloid scales, and dorsal, pectoral, and pelvic fin rays. When...

vertebrae do not extend into the tail, the white bass has what is called a homocercal tail. The body is deep and compressed laterally. Most grow to a length...

dorsal fin with about 10 dorsal spines followed by 10 to 12 rays and a homocercal tail. The typical length ranges from about 3–7 in and the fish usually...

while some had low angle heterocercal tails, some had tails approaching homocercal. The broad hypochordal lobe was supported by long, splayed fin radials...

especially defined on the posterior end. Mountain whitefish possess a forked homocercal tail. The short head has a small mouth underneath the snout. The short...

notochord. The bowfin has a rounded, heterocercal tail that resembles a homocercal tail. This type of tail gives the body a streamlined shape, which allows...

anal fin has two spines. The pelvic fins are close together, and the homocercal caudal fin is forked. Seven or eight branchiostegal rays are seen. The...

spine, and a tall, forked caudal fin, which externally appears to be homocercal (with two equally sized lobes). This general body plan is shared by active...

bases, each is followed by 5-7 finlets between them and the deeply forked homocercal tail. Scomberesox scombroides is an epipelagic, schooling species which...

University at the time of description. The tail of Leighiscus was largely homocercal with a reduced, most-likely short upper lobe though is incomplete. Even...

with a protruding lower jaw, a high and pointed dorsal fin, a forked and homocercal tail, and possesses an adipose fin. It is generally silvery white on the...

from the Middle Triassic of Italy and Slovenia reveal the oldest near-homocercal tail". Canadian Journal of Zoology. 104: 1–23. doi:10.1139/cjz-2025-0136...

one unpaired plate, which have a tuberculate texture. The tail fin is homocercal (having equally sized upper and lower lobes). The dorsal fin spine lacks...

multipunctatus has round eyes, a long and slender body, and a forked homocercal caudal fin. Scopelopsis multipunctatus' larvae are slender and range in...

with a thin membrane of tiny scales connecting them. The fin was likely homocercal, meaning that the upper and lower lobes were roughly equal in size. The...

Zangerl's 1981 description, the profile was fusiform, with a forked, homocercal caudal fin and greatly enlarged keels at the base of the tail (termed...

cartilage. The body shape of Damocles was fusiform, and the tail fin was homocercal (crescent shaped). The genus is highly sexually dimorphic, and male Damocles...

to the anterior edge of the pelvic fins. The caudal fin is forked and homocercal (upper and lower lobes of equal length). The dorsal fin contains at least...

metre (3.3 ft) of this was tail, including a deeply forked and probably homocercal caudal fin. The head is 50 centimetres (20 in; 1.6 ft) long, with a typical...

eight rays. This species also exhibits a fusiform body shape with forked homocercal caudal fins. Although southern and northern leatherside chub are similar...

teleosts to protrude their jaws outwards from the mouth. The caudal fin is homocercal, meaning the upper and lower lobes are about equal in size. The spine...

point, most likely to help with its ability to shoot water, as well as a homocercal tail. Syntypes of Toxotes blythii range from 61 to 131 mm in length. Archerfishes...

and operculum. In adults, the caudal fin displays a shallow fork and is homocercal. Pelvic, anal, pectoral, and dorsal fins are present, with the anterior...

males. The fish has a deep, laterally compressed body shape, a forked homocercal tail, and a complete, decurved lateral line. Its anal fin is composed...

opercular margin. heterocercal (of a fin) Not symmetric, e.g. in sharks. homocercal (of a fin) Symmetric. homology Similarity of features based on common...

had a dorsal fin supported by nine unjointed, bony rays, deeply forked, homocercal tail, a moderately developed anal fin, and a pelvic fin located well forward...

body was fusiform, and the tail fin was lunate (crescent-shaped) and homocercal. No specimens of E. richardsoni preserve pelvic fins or claspers, and...

to their silver-like appearance. The caudal fins are deeply forked and homocercal. They have two long, continuous dorsal fins. The first dorsal fin is spiny...

fish they have a terminal mouth with thick lips, 2 dorsal fins, a lunate homocercal caudal fin (upper lobe and lower lobe are equal length) and do not have...

hingemouth’s pectoral fins are small, rounded, and low on the body. Its homocercal tail has a rounded fan shape. Its dorsal, anal, and pelvic fins are all...

the dorsal fin on its back. The caudal fin or tail fin is notched and homocercal. This means that the tail has two lobes that are symmetrical. The northern...

cartilage. The caudal fin is heterocercal, but approaches a functional homocercal condition. Most Stethacanthids found come from the Bear Gulch Limestone...

dorsal fin and 15-19 rays in the anal fin.The caudal fin is forked and homocercal (the two forks of its tail are the same size). S. thaleichthys possess...

anatomical features consist of one possessing a straight lateral line, a homocercal caudal fin, and 12 to 13 rays. Typical size is indicative of specific...

have eight anal fin rays on the tail fin, which is a forked version of a homocercal tail. The dorsal fin lies behind the middle of the body. The dorsal fins...

e. a skeleton, paired fins, cycloid or ctenoid scales, covered gills, homocercal tails, protrusible jaws, etc...) The main requirements for the taxa are...

Gilliodus, Eugeneodus and many other caseodontoids such as fusiform bodies, homocercal caudal fins and reduced pelvic fins are associated with a pelagic mode...

position (the end of the snout projects only slightly past the mouth) and a homocercal tail (the vertebral column does not enter the caudal fin). Sand Shiners...

scales (40–43 of these scales run along the lateral line) and a forked homocercal tail. Gravel Chubs are soft ray-finned fish and have no adipose fin. The...

eight rays. This species also exhibits a fusiform body shape with forked homocercal caudal fins. Although southern and northern leatherside chub are similar...