ID This Polypterus

[Tendou Souji]

Here are some bichir bichir and lap photos I taken from a web. See if anyone can distinguished them.

IMO, only pic 1 shows a PBB (not very sure though, may be a lap as well) while the rest are lapradeis. So bro, what's the right answer?

 

[putra]

Looks like a CB Lapradei perhaps close to a Nigerean

Looks like a CB PBB too me. I also counted 15-16 dorsal finlet, contrast on it looks like a CB PBB.

i just wanna know what is the difference between lapradei and polypterys?
is it in a same family?
cos from what i see their head shape and fins just looks almost the same..
(for a newbie like me, of course)