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The shape of the ventricle varies considerably, usually tubular in fish with elongated bodies, pyramidal with a triangular base in others, or sometimes sac-like in some marine fish. [ 45 ] Outflow tract (OFT): Goes to the ventral aorta and consists of the tubular conus arteriosus , bulbus arteriosus , or both. [ 45 ]
Like most fish, the tilapia has a streamlined body shape reducing water resistance to movement and enabling the tilapia to cut easily through water. Its head is inflexible, which helps it maintain forward thrust. [3] Its scales overlap and point backwards, allowing water to pass over the fish without unnecessary obstruction. Water friction is ...
A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits.Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians.
Fin arrangement and body shape is relatively conservative in lobe-finned fishes. However, there are a few examples from the fossil record that show aberrant morphologies, such as Allenypterus, Rebellatrix, Foreyia or the tetrapodomorphs.
Anguilliformity is a morphological pattern in fishes, named for and typified by the eels.Anguilliform fish have a long, slender body, and travel by anguilliform motion.The caudal fin is often emphasized, with the other fins reduced, absent, or fused with the caudal fin.
Their body shape comes in two forms: either more slender or more plump. [10] In general, mature individuals are characterized by a deep olive above and white below, with a smooth variation in shading along the sides, and a brassy reflection. The fish has broad scales and a relatively large head compared to body. [11]
A fish scale is a small rigid plate that grows out of the skin of a fish. ... Within each organism, scale shape varies hugely according to body area, [8] ...
The collision causes drag against moving fish, which is why many fish are streamlined in shape. Streamlined shapes work to reduce drag by orienting elongated objects parallel to the force of drag, therefore allowing the current to pass over and taper off the end of the fish. This streamlined shape allows for more efficient use of energy locomotion.