Distended fins – Unpaired fins fully distended.

Open opercula – Opercula open at more than 60°.

Caudal swing – Waves the caudal fin towards the opponent. 

Pelvic fins flickering – Flicks the pelvic fins towards the opponent.

Bite – Tries to bite the opponent (mouth movement detected). 

Ramming- Hits the opponent with the mouth closed.

Charges- Fast swim in the direction of the opponent.

Surface air breathing – Engulfs air from the surface (often with air bubble release). 

Frontal display- Distended fins and/or open opercula and head at +/- 60°. 

Lateral display- Distended fins and/or open opercula and head at +/- 60-120°. 

Back display- Distended fins and/or open opercula and head at +/- 120-180°. 

Aggressive color on – The fish fully darkens the body. Red and blue colors often become visible.

Color off

Color on