If by "convict" you mean the "Convict Cichlid"(Cichlasoma nigrofasciatum) then the answer is a definite YES they are tropical. They can handle temperatures down as low as 72F for short periods of time but should normally be kept at around 75F to 80F.
No, catfish is not a tropical fish.
Yes, it is bad to put tropical fish in with river fish. The river fish can make the tropical fish sick.
Yes, a siclet is a tropical fish
no they are not TROPICAL FISH NO NO NO BLACK ANGELFISH IS
No. Tropical Fish required warmer water.
There are millions of tropical fish in the tropical oceans. But they are all marine fish not freshwater fish. Freshwater tropicals can not live in saltwater.
Yes, most species of the Porcupine Puffer Fish are tropical fish.
Well if you consider that mollies are tropical fish... then tropical fish food (Flakes) are good yes.
By the size, it's patterns/colours I BELIEVE TAHT THE GIRL TROPICAL FISH HAS EITHER A LONGER TAIL OR IS A LIGHTER COLOR THEN THE BOY TROPICAL FISH
Yes, all fish have gills, including fish from the tropical regions of the earth.
Generally, cichlid eggs such as those laid by convicts hatch in three to five days. Convicts are relatively easy fish to breed.
72 legs A tropical fish has 72 legs