To get to the other side!
Where did you get the back and forth kind? Mine only swim to and fro.
In semi-seriousness, angelfish in their natural habitat have freedom of movement and exercise that. In an aquarium, back and forth is the only way to go. If you will allow a moment of anthropomorphism, they're probably looking for the way out.
Danio fish like to swim on the top, and they like to swim back and forth all of the time( mine do)
You probably scared it
They swim or crawl like moving there body back and forth
They paddle in the same way a dog does the doggy paddle in water. Back legs move back and forth while the front paddle away.
A two-hundred yard freestyle is an event at a swim meet in which the swimmer will swim the freestyle stroke back and forth across a normal pool four times (twice across, twice back).
Yes, ponies can swim. They are capable swimmers and can navigate through water, although their ability to swim may vary depending on the individual pony and its training or experience with water.
A flagellum is actually a sort of 'tail' that the single-celled animal whips back and forth to "swim" through liquid, like water.
Fish move by swimming. They move their fins back and forth to swim. Some fishes have a swim bladder which is an organ that help bony fish stay in different depth.
because its probably sick and need to see a vet... if this continues notify your vetit probably has some kind of diseaseMost likely a swim bladder disease
no. EDIT: Incorrect. Fishyfisher82 has a two year old veil angelfish in a 36gal tank (and all the size that implies) with a trio of glass cats who have been coexisting for well over a year. So long as the fish can swim quickly and are not too tiny, and you only have ONE angelfish, you're fine. Angelfish will most likely eat guppies, though.
Run back and forth.
The word for walking back and forth is "pacing."