Filamented Vs. Blue Flasher Vs. Bellae

[z's_N_p's]

what are the main differences between the three? is the difference mostly when they flash? seems like the Filamented and Blue Flasher are very much alike when they are swimming normal. I haven't seen the Bell's in person so I don't know what the difference is compared to the other two. I wonder if the Bell's is just a hybrid? are there any other pictures of the Bell's flasher besides the ones from Pisces kazu?

Thanks for any input.