It is a common noun
Noun
No, the noun 'catfish' is a commonnoun, a general word for a species of fish.A proper noun is the name of a specific person, place, or thing; for example:James "Catfish" Hunter, American baseball playerCatfish Stream Avenue, Las Vegas, NVCatfish Cove (restaurant), Oklahoma City, OK
Bullheads are not sold commercially, but are common catfish across North America.
That depends on the species of catfish unfortunately. Corydoras are common freshwater aquarium catfish and can live from 10-15 years.
Very common. Bristlenose are easy to breed and will do so if conditions are OK for them.
A group of catfish is called a school. Yep, just like those annoying kids you had to deal with back in the day. So next time you see a bunch of catfish swimming together, just think of them as the cool kids of the underwater world.
Common noun
Unless it is a localized indigenous name, (common in the American South) they are known (properly) as "Blue Catfish", a specific species of catfish.
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
Most definitely a common noun.