They want feeding.
That refers to where the fish eat; near the surface or towards the bottom of the tank.
Bettas do this because they are tropical fish and like warm water. They like being at the top because they breathe air like people. If they are sleeping or relaxed, they will often hand near the top so they can just constantly breathe.
the cause might be a sick fish, a dirty tank, or over feeding.
every thing is its habitat, a river, pond, sea, fishbowl, tank, ocean, etc. a fish has many habitat
Dead or dying
to eat food
The Ocean. Supposedly near Australia, because the scenes in the fish tank take place in a fish tank in Australia.
food flaots
Guppies are surface fish and they also enjoy swimming/playing in water currents that is why they are there.
opline gourami, guppies ,hatchet fish
Some fish prefer swimming at the top of the tank while others the bottom or middle.
Could be anywhere.