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Fusiform, a body shape common to many aquatic animals, characterized by being tapered at both the head and the tail [1] Fusiform, a classification of aneurysm; Fusiform bacteria (spindled rods, that is, fusiform bacilli), such as the Fusobacteriota; Fusiform cell (biology)
The body is often fusiform, a streamlined body plan often found in fast-moving fish. Some species may be filiform ( eel -shaped) or vermiform ( worm -shaped). Fish are often either compressed ( laterally thin and tall) or depressed ( dorso-ventrally flattened).
The fusiform body shape of Clupeidae is also advantageous to their trophic ecology. The tapering body form is a highly hydrodynamic form that allows for quick increases in speed and a high maximum speed. Moving at high speeds allows the members of this family to regulate their feeding habits and avoid predators.
As fry, this fish is 5 mm (3 ⁄ 16 in) long, and some of the larger eastern blacknose dace can reach slightly over 100 mm (3.9 in). They tend to live for two or three years and grow continuously during this period. [4] They have a fusiform body shape and the mouth is in a subterminal position.
The body form of roosterfish is elongate and fusiform in shape. They have wide bands of simple teeth lining the inside of their pointed head. Their dorsal fin always has seven spines and a separate section of 25 soft rays, the anal fin has two spines and 15 soft rays, the pectoral fin has 16 soft rays that are very long and curved.
The totoaba have an elongated compressed fusiform body shape with a terminal oblique mouth and lower jaw that projects slightly. [10] The totoaba has two dorsal fins with a clear separation between them. The anterior dorsal fin is a spinous portion, and the posterior dorsal is a soft-rayed portion providing balance, maneuverability, and protection.
Their food is smaller fish and crustaceans . Typically throughout the species, the maximum size is 1 m (3.3 ft) and the maximum weight 10 kg (22 lb). The body is fusiform (tapering spindle shape) and oval in cross-section; being slightly laterally compressed, and the eyes are large and partially covered with adipose eyelids.
The yellowback fusilier is a small to medium-sized fish which grows to about 40 cm (16 in) long. [5] The mouth is small and terminal and is protusible, being able to be extended forward to swallow food. The body is fusiform or spindle-shaped. The dorsal fin has 10 spines and 14–15 soft rays. The anal fin has three spines and 11 or 12 soft rays.