If it's a guppy and if it's pregnant, it might have it's babies soon.
Filter a fish? Do you mean filtering a fish's tank? Well you have to filter any fish's tank.
no filter because for smaller fish it can hurt or even kill them and for the old filter use bigger fish
a fish filter cleans the water and a pump pushes it through a fish filter cleans the water and a pump pushes it through
yes,it is hard to clean out a pet fish's filter
The filter removes the fish waste and some of the other impurities.
Jawless fish are filter-feeders.
it just mean he's sick and he needs to change the water or get a filter
If you mean the smell, you can use carbon in your filter. You can get aquarium carbon from an online retailer such as www.bigalsonline.com
No! Well, that depends on what you mean by a fishbowl. If you literally mean a bowl with marbles and water like you would use for a goldfish or a betta, no. If you mean an aquarium with plants and an actual heater and filter, then yes. Hatchet fish make good freshwater aquarium fish.
Jawless fish are filter-feeders.
It means absolutely nothing. I hope you also have a filter connected up to the air pump because bubbles do absolutely nothing to help your water quality. A cycled filter is essential in every occupied fish tank.
It is best that all fish have a filter besides Betta fish. Betta fish don't need filters cause the filter pushes them over with their big fins. Goldfish should have a filter on there tank because they are often overfed. If you have a filter you won't have to change the water as often. The only fish that shouldn't have a filer in captivity are Betta fish.