Damage to the fins is the first sign of bad (putrid)water. The fish will get very sick with gill and scale damage next and if you do nothing the fish will die. You urgently need to do a few major (at least 70%) water changes ASAP. Goldfish need a minimum of 1 gallon of water per 1 inch of body length. Even given a nicely set up, properly filtered, planted, well lit aquarium, they should also have at least 50% of their water replaced each week.
knife fish, tetras, knight crabs, barbs, red tail catfish ext
the head and the tail, hope this is helpfull
the guts, the head, the tail, the skin, and the scale's
Guts, fins, tail and eyes.
There are plenty its head its eyes it bones its tail etc.
He could die or get sick
No part of the tadpole falls of. The tadpole grows legs and then the tail shrinks. It doesn't fall off.
lungs and a heart i think
deepest part of the ocean floor called the abyssal plains.
Force created by the tail and tail fin to propel the fish forward and steer the fish;
Yes, a fish needs a tail to swim.
have you ever thought that your fish were not compatible? Some fish such as beta fighter fish are very domianat over territory and can not be in the same tank as another fighter fish. I believe tha your fish may have fought leading to the rips in their tails.