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They have three pairs of barbels, with maxillary barbels that may reach the length of the fish's body. Like many other catfishes, their bodies lack scales. The adipose fin is well developed. [3] Many species of Pimelodidae have juvenile forms that appear differently from their adult forms in color pattern, as well as body shape. [10]
The head or skull includes the skull roof (a set of bones covering the brain, eyes and nostrils), the snout (from the eye to the forward-most point of the upper jaw), the operculum or gill cover (absent in sharks and jawless fish), and the cheek, which extends from the eye to the preopercle. The operculum and preopercle may or may not have spines.
Four-eyed fish have two specially-adapted eyes which are raised above the top of their head. The eyes are divided in two different parts, and the fish floats at the water surface with only the lower half of each eye underwater. The two halves are divided by a band of tissue and the eye has two pupils, connected by part of the iris.
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Flathead are notable for their unusual body shape, which their hunting strategy is based upon. Flathead are dorsally compressed, meaning their body is wide but flattened and very low in height. Both eyes are on the top of the flattened head, giving excellent binocular vision to attack overhead prey. The effect is somewhat similar to flounders ...
Most batoids have a flat, disk-like body, with the exception of the guitarfishes and sawfishes, while most sharks have a spindle-shaped body. Many species of batoid have developed their pectoral fins into broad flat wing-like appendages. The anal fin is absent. The eyes and spiracles are located on top of the head.
Cat eyes are similar to brass knuckles but in the shape of a cat face, with sharp and pointy ears that act like small daggers to stab or gouge. People slip their fingers through the spaces of the ...
The small terminal mouths of filefish have specialized incisor teeth on the upper and lower jaw. In the upper jaw there are four teeth in the inner series and six in the outer series. In the lower jaw, there are four to six in an outer series only. The snout is tapered and projecting and the eyes are located high on the head.