yes because of the vibrations they have orgasms so they make moaning noises
no, cat fish are like any other fish apart from looks!
Constant loud noises can cause stress in fish, which can lead to loss of appetite or other health problems. If the loud noise is a one time occurrence or does not happen often, the effects on the health of your fish will be minimal if any.
Unfortunately, I believe it's time to replace the fish.
Bait fish and small organism tend to be swept up by fast moving water. This allows larger fish to feed more easily as the bait is more concentrated in these areas.
If you are at the point to where your other fish's life is in danger, consider moving them to different tanks.
yes bubbles help bring air to the fish and keep the water moving
A piranha swims the same way as any other fish by moving its tail from side to side which gives it forward propulsion in the water
They are used to propel the fish through the water, and in some cases they are used to keep water moving through the gills!
Not successfully. Moving water will likely knock the eggs out of the nest. The water should be near still with only an airstone present.
they eat other fish in the water cuz fish cant come out of the water
Fishes have gills when the water is moving on the gills than fish breaths and take oxygen from water.
swordfish move by moving their tail side to side in water.