Yes, although they don't look exactly the same as fish scales, if you look closely their bodies are covered in scales and very small fins.
In the Old Testament, shellfish such as shrimp, crab, lobster, and other forms of seafood without fins and scales were considered unclean and forbidden to be eaten by the Israelites. This is outlined in Leviticus 11:9-12.
shrimps don't really have either. They certainly dont have scales. You could call some of the paddle like structurs in pelagic shrimp 'fins' but i probably wouldnt.
No, lobster is not kosher. The reason for this is that aquatic animals must have both fins and easily removed scales in order to be kosher.
Lobster is not considered kosher. It is unable to be blessed by a Jewish rabbi. Only sea creatures with fins and scales can be kosher.
It is widely consider unclean but consider the following. I think we can all agree that shrimp have fins as seen in this picture so the question is do shrimp have scales, what are scales? I would define scales as a overlapping armor, on this definition I believe shrimp have both fins and scales. So I do believe shrimp is clean according to the scriptures.
No it does not have scales, and yes, it has fins
There are certain "swimming" fishes that are kosher, such as salmon, tuna, yellowtail, tilapia, sole, halibut, flounder, etc. However, some fishes and all non-fishes are not kosher, such as catfish, shark, shrimp, lobster, mussels, langostines, squid, octopus, etc.
Shrimp
There are many classes of fish which do not have scales nor fins. The Agnatha has neither fins nor scales; the Condrichthye, including sharkes, rays and skeats have fins but no scales; the Ostichthyes, of which several families have members with the common name, mackerel, with both scales and fins. The King Mackerel, S. cavalla, has very tiny scales and fins.
Yes all tuna have fins and scales
Tilapia fish has fins and scales like any other fish. The tilapis fins and scales are less difficult to remove.
Yes all species of Tuna have both scales and fins.