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27 Μαΐ 2024 · The hardhead catfish is characterized by a long body, forked tail, flattened head with hard bony plates, and, of course, six barbels (whiskers) projecting from the mouth and chin that help it sense its surrounding environment.
Thin bones by the swim bladder can be vibrated by specialized sonic muscles. Also, grinding of the pharyngeal teeth and rubbing of the pectoral spines against the pectoral girdle can produce sound. These two mechanisms appear to be evolved fright responses by the hardhead catfish.
The head may have several fleshy structures known as barbels, which may be very long and resemble whiskers. Many fish species also have a variety of protrusions or spines on the head. The nostrils or nares of almost all fishes do not connect to the oral cavity, but are pits of varying shape and depth.
The common name, hardhead catfish, is derived from the presence of a hard, bony plate extending rearward toward the dorsal fin from a line between the catfish's eyes. It is an elongated marine catfish that reaches up to 28 in (70 cm) in length and 12 lb (5.5 kg) in weight.
19 Σεπ 2024 · Fish skulls are made up of a collection of juvenile bones that are hazily attached. Except for a few, most fishes’ skulls are linked to the body. In this article, we’ll examine the fish skull, its components, the way fish move, and the obscure mysticisms that lie behind it.
The head may have several fleshy structures known as barbels, which may be very long and resemble whiskers. Many fish species also have a variety of protrusions or spines on the head. The nostrils or nares of almost all fishes do not connect to the oral cavity, but are pits of varying shape and depth.
Identify the elements of the fish head listed below and recognize the skull region to which each element belongs. Recognize which bones are endochondral and which are intramembranous in origin. Overview. This lab marks the start of a study of the vertebrate skull.
