ever see your oscar yawn? ive seen mine do it from time to time and i find it funny that it makes me yawn as if i was to see another person do it. ive also never seen any other fish do this besides oscars.

yawning, sulking, and liplocking are regular characters
of an oscar..... darting, gasping, and not moving is a sign
of problem.

but during spawning, they will drive everything away from
their slate. very protective in a hulking manner....

My Oscars do yawn on occasions. There is a theory that it could be connected to high nitrates. However since my nitrates are quite low, my Oscars are not doing it for that reason. I think they probably do it to stretch their jaws. But at the end of the day, I'm only guessing.

my oscars sometimes do it but if i'm not mistaken malawi cichlid also yawn.
looks kinda of funny but i don't have a clue why they do it.
maybe it's like ofl said, they're stretching their jaws.

all my cichlids yawn as well. even the africans. i as well have low nitrates in my tanks so like ofl that cant be why.

i thought that when a oscar yawns it was to show other tank mates how big he is.. my 2 smaller ones dont do it but the larger one dose all the time!

Just a normal behavior.

I think when they open their mouths and flare their gills that is a sign that they are trying to show how big and strong they are. Mine don't yawn very often, but when I've seen them doing it, they aren't fighting or showing any aggression. Actually, I'm very lucky, the four Oscars I've got in my 300 gallon tank seem to get along really well.

same here, my tanks nice and peaceful. i was just sittin on the comp on the site, i looked over at my tank and saw him yawn, and it made me yawn as well, so i threw up a post ^^