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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.
The pinhead pearlfish is a slender, tapering, eel-like fish that can grow to a length of 30 cm (12 in). It has very small eyes and near the jaws are star-shaped melanophores which are more numerous in older specimens. This fish has no scales or pelvic fins, but does have short pectoral fins and an elongated dorsal fin with 31 to 42 soft rays.
There is a single pair of tube-like nostrils and these fishes have no scales although the lateral line canal is well-developed and is situated high on the body parallel and near the base of the dorsal fin. [2] The extant species both have maximum total lengths of around 30 cm (12 in). [7]
A muskie will have seven or more per side, while the northern pike never has more than six. The lobes of the caudal (tail) fin in muskellunge come to a sharper point, while those of northern pike are more generally rounded. In addition, unlike pike, muskies have no scales on the lower half of their opercula. [citation needed]
Sticklebacks are carnivorous, feeding on small animals such as insects, crustaceans and fish larvae. [8] [9] Sticklebacks are characterised by the presence of strong and clearly isolated spines in their dorsal fins. [10] An unusual feature of sticklebacks is that they have no scales, although some species have bony armour plates.
A fish scale is a small rigid plate that grows out of the skin of a fish. The skin of most jawed fishes is covered with these protective scales, which can also provide effective camouflage through the use of reflection and colouration, as well as possible hydrodynamic advantages.
The immaculate puffer is a pufferfish and has a rounded body with a short tail. They have no scales or clear lateral line. They are grey or light brown, though they have the ability to change this to a mottled grey-green coloration presumably used for camouflage. [2] The lips and iris of the immaculate pufferfish are yellow. The caudal fin is ...
They have either smooth scales or no scales, a long dorsal fin and an anal fin that typically runs into the caudal fin. They mostly come from the tropics and subtropics, and live in both freshwater and marine habitats, including abyssal depths. They have adopted a range of feeding methods and lifestyles, including parasitism.