== == anything aggressive
the fin the donkey
The fin grows in
The butterfly fish often has a dot on it's dorsal fin that gives the impression that its "rear" is actually its "front," fooling and distracting many predators into attacking from the wrong angle.
fin rot,white spot,ancor worm,fish lice and some more things.
Spot-fin porcupinefish was created in 1758.
On a dolphin and most fish the fin behind the dorsal fin is the tail fin. Some fish, such as knife fish, have no dorsal fin or tail fin. Dolphins of course are mammals, not fish.
The distinguishing characteristics that can help determine the gender of a Dalmatian Molly fish include the shape of their anal fin and the presence of a gravid spot on the female's abdomen. Male Dalmatian Molly fish typically have a pointed anal fin, while females have a more rounded anal fin. Additionally, females may develop a dark spot on their abdomen called a gravid spot, which indicates that they are carrying eggs.
The gravid spot on a platy fish is a dark spot near the fish's anal fin that indicates pregnancy. It is caused by the darkening of the skin due to the developing embryos inside the female fish. By observing the size and darkness of the gravid spot, one can determine the reproductive status of the fish and whether it is pregnant or not.
The female gets a deeper tummy and there is a dark (gravid) spot by her anal fin.
The tail fin of a fish (the caudal fin) is a fish's means of propulsion through the water.
Butterfly fish can grow up to 5 inches in length. However, in an aquarium setting, they may grow no larger than four inches. The African butterfly fish is a freshwater fish that can live up to five years.
Signs that a platy fish is pregnant include a swollen abdomen, dark spot near the anal fin (gravid spot), increased appetite, and behavior changes such as hiding or seeking isolation.