Anglefish Locking Jaws/Kissing!!!

Hi

Some advice please. I've a large community tanks which has been established
for well over 2 years (280 lts).

I've 4 angles (6in, 5in & 2x 4 inch all got at same time).

today we notice some unusual behaviour, the larger 2 are driving fish from
one area of the tank are locking jaws & mirroring each others movements.

I'm guessing they are getting ready to spawn. If this is the case any advice
for a first time Angle dad.

Thanks in-advance