In order to reproduce? Yes, but mating can entail many things, and in fish is generally manifested by external fertilization of egss.
Fish sexually reproduce.
It depends on what kind of fish they are; tropical fish will reproduce many times in a year, whereas many temperate species will only do so once a year.
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.
Star fish reproduce by splitting. They are asexual so they don't need a partner to reproduce.
Yes, most species of the Porcupine Puffer Fish are tropical fish.
More fish.
Well if you consider that mollies are tropical fish... then tropical fish food (Flakes) are good yes.