they have fins but no scales, only skin.
Yes, they are a species of cod.
Yes they do. They are in the cod family.
Rock cod (scorpionfish) have poisonous spines in their dorsal fins, but their flesh makes good eating.
Cod was a generic name for various kinds of fish (including hake and the haddock) and can refer to different fish in different parts of the world. In those parts of the world where cod refers to fish with scales, then cod will be Kosher. All Kosher fish need fins and scales.
That's a good question. Not all fish have scales. Swordfish, catfish, cod, mackerel, whiting, sturgeons, sharks and eels are just a few examples of fish without scales. The mahi-mahi fish does have scales, and is a clean fish, suitable for human consumption, according to the bible. Leviticus 11:9 states: "Of all the creatures living in the water of the seas and the streams, you may eat any that have fins and scales". Mahi-mahi meets the criteria of having both fins and scales.
Yes, cod have scales. They have cycloid scales which have a smooth outer edge, making them more difficult to spot.
yes they do
Black codfish do have scales, which are generally very small. Possibly due to the size and color of the scales, it may seem that the black cod does not have scales.
There are several/many species of fish that are called "Cod". They all have scales as far as I know.
No. They have skin.