Oh, dude, you're like so close but not quite there. The sturgeon fish is actually a cartilaginous fish, not a lobe-finned fish. So, like, they're kind of distant cousins in the fish family tree, but not quite the same. Keep swimming in that sea of knowledge, my friend!
They are a tropical ray-finned fish.
The main difference between lobe-finned fish and ray-finned fish lies in their fin structure. Lobe-finned fish have fleshy, lobed fins supported by a bony structure, while ray-finned fish have fins supported by bony rays. Additionally, lobe-finned fish are believed to have given rise to tetrapods, including amphibians, reptiles, birds, and mammals.
Perch are lobe-finned. The fins on Perch fish are fairly rounded and distinct for this species of fish in the wild.
They are a tropical ray-finned fish.
Sturgeon belongs to the class Actinopterygii, which includes ray-finned fish.
The coelocanth is one example of a lobe finned fish. Another example would be the six extant (non extinct) species of lungfish.
lobe-finned fish
lobe-finned fish
It lived in water.
http://en.wikipedia.org/wiki/Actinopterygii They are ray-finned. Search for 'perch' on that page and it says on there =]
The bony fish. They are also known as lobe-finned fishes.
lobe-finned fish