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In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the latter dealing with how those components function together in living fish. The ...
The fimbriated fold of tongue, also plica fimbriata, is a slight fold of the mucous membrane on the underside of the tongue which runs laterally on either side of the frenulum.
Some fish like carp and zebrafish have pharyngeal teeth only. [30] [31] Sea horses, pipefish, and adult sturgeon have no teeth of any type. In fish, Hox gene expression regulates mechanisms for tooth initiation. [32] [33] While both sharks and bony fish continuously produce new teeth throughout their lives, they do so via different mechanism.
Odontodes, or dermal teeth, are hard structures found on the external surfaces of animals or near internal openings.They consist of a soft pulp surrounded by dentine and covered by a mineralized substance such as enamel, a structure similar to that of teeth. [1]
The teeth are in several series; the upper jaw is not fused to the cranium, and the lower jaw is articulated with the upper. The eyes have a tapetum lucidum. The inner margin of each pelvic fin in the male fish is grooved to constitute a clasper for the transmission of sperm. These fish are widely distributed in tropical and temperate waters. [15]
Fish and crustaceans seem to find brachiopod flesh distasteful. [2] The fossil record shows that drilling predators like gastropods attacked molluscs and echinoids 10 to 20 times more often than they did brachiopods, suggesting that such predators attacked brachiopods by mistake or when other prey was scarce. [ 42 ]
This diagram was created with Inkscape, ... Description= en: Schematic drawing of inner anatomy of a teleost (fish). 1 liver, 2 stomach, 3 intestine, 4 heart, 5 swim ...
Taxodont; rows of similar interlocking teeth on either side of the umbones, as in the arc clams. Dysodont; weak teeth near the umbones, as in the marine mussels. Isodont; lateral tubercles and sockets on either side of a thick ligament referred to as a resilifer, typical of the oysters and scallops.