Livescope Question

I just viewed a video that showed 2 vertical masses over a brushpile at about 20'..Turned out to be 2 Bass.

I have also seen several videos where crappie showed up as dancing dots...Is it 2 different Livescopes that makes the fish appear different?

I guess my question is "why" the difference..Why didn't the vertical masses show up as larger dots? I would have had trouble identifying the masses as fish..

Thanks

Fish will usually move on the screen pretty easy to spot.Yes some are more of a line up and down and some that get closer to the transducer are more round and than some side pics are very easy to see the fins and the fish swimming