Sp00ky
Moved On
ITs just, i was in my LFS yesterday and i noticed that the PK's werent doing the "kissing" thing at all. They looked kinda strange not doing it, after i spend so much time watching my 2 doing it.
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I believe its a sign of aggression, I'm not totally sure though. Maybe someone else will be able to confirm this for you.
Lip locking between any species of fish is usually a sign of aggression and fighting, it also occurs alot with Cichlids during courtship.