Search by the name at the fish counter, in another language or by the scientific name, which is the one that doesn't mislead.
37 fish
Merluccius spp.
Salmo salar, Oncorhynchus spp.
Salmo trutta, Oncorhynchus mykiss
Thunnus spp.
Several species are sold as tuna. In a can the fish may be kosher and the product not: look for the symbol.
Sarda spp.
Scomber spp.
Micropogonias spp.
Sardina pilchardus, Sardinops sagax
Engraulis encrasicolus
Canned or jarred, look for the symbol: plants that pack them also pack other products.
Clupea harengus
Gadus morhua, Gadus macrocephalus
Melanogrammus aeglefinus
Paralichthys spp., Solea solea
Hippoglossus spp.
Pleuronectes platessa, Platichthys spp.
Pagrus pagrus
Called besugo in Argentina, where Spain uses that name for another species. Trust the scientific name.
Epinephelus spp.
Around the River Plate another species is also sold as mero and is not on the list cited: ask.
Mugil spp.
Trachurus spp.
Seriola spp.
Coryphaena spp.
Lutjanus campechanus
Many fish are sold as red snapper and not all of them are this species.
Cyprinus carpio
Esox lucius
Tilapia spp., Oreochromis spp.
Xiphias gladius
It has scales when young and loses them as an adult. Orthodox certifiers do not accept it; the Conservative movement does.
Acipenser spp.
The question is whether its bony plates count as scales. Orthodox certifiers accept neither it nor its caviar; the Conservative movement does.
Siluriformes
It has no scales.
Lophius spp.
It has no scales.
Scophthalmus maximus
Its scales cannot come off without tearing the skin.
Anguilla spp.
Selachimorpha
Batoidea
Decapoda
Crustacean.
Decapoda
Crustacean.
Cephalopoda
Mollusc.
Bivalvia
Mollusc.
This list is a guide and common names mislead: the same name means different species in different countries. A kosher fish that is processed, cooked or packed elsewhere still needs supervision. When in doubt, ask your rabbi.