The only accurate way is by the use of a microscope. The rings on the a scale are counted in much the same way as the rings on a tree are counted to establish growth seasons. The more experienced aquarist can make an educated guess going on the fishes size and condition.
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
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.
scales can tell you how old a fish is by the number of rings on a scale
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.
One way to sex a tropical fish is to observe a mature male or female. The female will eventually lay eggs and the male will show his penis if a mature female is around.The way to sex a tropical oscar fish is to simply observe whether or not the female lays eggs. It is not possible to tell by just looking at the fish.
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.
Yes, all fish have gills, including fish from the tropical regions of the earth.