Yes, there are many diseases that they can get from bad pH levels and bad nitrate conditions. Different types of fish require different types of water conditions. Pond fish. such as kio, if there waters are not kept clean, they could get fish lice.
We polute the oceans and the fishes catch diesieases. When the fishes runs down to the north pole. The polar bears eat it and get sick and die.
you mean 'cichlids' (pronounced "sick-lids"). And yes, they tend to be 'meaner' than most fishes.
FISHES!
jeol fishes are fishes who have dual respiratory organs. rakesh
pairing in fishes
No. There can not be too much oxygen in a fishes water. If a fish is swimming upside down and it is not of a species known for doing that, then the fish has a damaged swim bladder. The fish is very sick and will die.
Big fishes eat medium fishes as that's just part of the food chain.
Medium fishes eat small fishes as that's just part of the food chain.
The Fishes...
Fishes lay eggs.
Jawless fishes are voracious feeders while cartilaginous fishes are predators with a various diet.
lobe-finned fishes and two of them are the lungfishes and the coelacanths but mostly the LOBE-FINNED FISHES