Fish can't survive without water !
No parrot fish have a backbone and are a verterbrate. Invertabrates have no back bone or bones at all. That is how they are different from verterbrates.
Lamprey are the only species of fish that do not have a jaw, or fixed appendages, unlike other fish. They suck nutrients and organs from other organisms.
No, they are invertebrates (Echinoderms). Echinoderms have no backbones, like the Brittle Star and Sea Urchin.
All fish have backbones, all animals with backbones are vertebrates.
Colorations coupled with size and shapes and with the natural resistant to anemones make them unique.
no they don't they have caralige (they same stguff in your ears and nose) this is what makes them different from other fish
fish can be different
they can live in different types of waters
their blood type
Sharks have no swim bladder for buoyancy. Instead, an oily liver aids in bouyancy.
If you are at the point to where your other fish's life is in danger, consider moving them to different tanks.
Because so you can diferense it