Basa fish, just like all other forms of catfish, is not kosher.
Kosher fish have fins and scales. I've attached a related link that provides a comprehensive list of kosher fish.
Fish and chips can be kosher if it`s made with kosher fish in a kosher kitchen. In fact, it was Portuguese Jews who introduced fried fish to England.
Fish and chips can be kosher so long as the fish used is a kosher species and the food is prepared in a kosher kitchen with all kosher ingredients.
The signs of a kosher fish are scales and fins. If the fish does not have either of these, then it is not a kosher fish. If it does, it is a kosher fish and one may eat it provided, of course, that it was prepared with kosher ingredients. According to "kashrut.com" (see link in related link section), the Grouper is indeed a kosher fish.
Yes opa is a kosher fish. Any fish that is born with scales and a dorsal fin is kosher. As long as it hasn't been touched by a non kosher knife
Sawfish, also know as Carpenter Shark, are a family of rays. These fish are not kosher as they do not meet the two requirements of kosher fish: movable fins and easily removed scales.
Rascasse fish is also known as Scorpionfish which is a kosher species. Please see the related link for a comprehensive list of kosher and non-kosher fish.
If it comes from kosher fish such as whitefish, yes. If it comes from non-kosher species such as sturgeon, then no.
No. Swai is a type of catfish, and catfish are not a kosher species of fish.
Seer fish, also known as Spanish mackerel, is kosher.
Brazino, also known as seabass, is a kosher species of fish.
Bassa fish are typically found in freshwater environments such as rivers, lakes, and ponds. They prefer warm waters and are commonly found in tropical regions. Bassa fish are omnivorous and can adapt to a variety of habitats within freshwater ecosystems.