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The jaws have conical teeth. Typically, tilapia have a long dorsal fin, and a lateral line that often breaks towards the end of the dorsal fin, and starts again two or three rows of scales below. Some Nile tilapia can grow as long as 60 centimetres (2 ft). [12]
Any fish without scales are haram (forbidden) but fish that do have scales are permissible. [2] Shia scholars tend to teach that no other aquatic creatures are halal, with the exception of certain edible aquatic crustaceans (e.g. shrimp but not crab), [3] [4] [5] which are also Halal like scaled fish.
Mandarinfish lack scales and have a layer of smelly and bitter slime which blocks out disease and probably discourages predators, implying their bright coloration is aposematic. [63] Anglerfish have loose, thin skin often covered with fine forked dermal prickles or tubercles, but they do not have regular scales. They rely on camouflage to avoid ...
The Nile tilapia (Oreochromis niloticus) is a species of tilapia, a cichlid fish native to parts of Africa and the Levant, particularly Israel and Lebanon. [2] Numerous introduced populations exist outside its natural range.
Additionally, their feet do not have the small claws and digits of rodents or lagomorphs, instead resembling miniature elephant-feet, with toenails specially adapted for climbing rocks. The hare, for chewing the cud without having cloven hooves. [2] [5] The pig, for having cloven hooves without chewing the cud. [6] [7]
Like the Nile tilapia, the kidney of some fish shows its three parts; head, trunk, and tail kidneys. [36] Fish do not have a discrete adrenal gland with distinct cortex and medulla, similar to those found in mammals. The interrenal and chromaffin cells are located within the head kidney. [36]
The native Mozambique tilapia is laterally compressed, and has a deep body with long dorsal fins, the front part of which have spines. Native coloration is a dull greenish or yellowish, and weak banding may be seen.
Oreochromis leucostictus is a relatively deep-bodied tilapia with a fairly small mouth, narrow, rounded head and high back. Juvenile are pale, countershaded and have around 8 thin faint dark bars on the flank beneath the dorsal fin, with other bars on the head and tail. The fins are faintly spotted and there is a rather vague dark 'tilapia mark ...