Join Date: Feb 2013
Location: Fredericton, NB, Canada
Odd Harlequin Rasbora swimming behavior?
I've had 5 Harlequin Rasbora in quarantine for the last week and I've been noticing some odd swimming behavior from 1 of the 5. At times the odd one out has been seemingly having trouble maintaining a given height in the tank. He'll be swimming at a slight down angle and when he stops swimming he immediately starts to rise up. He must constantly swim in bursts to maintain the height he's at.
This morning for example he was swimming as described above, then after the lights went in he went back to normal swimming being able to maintain height without rising.
Has anyone seen anything similar or could explain this behavior?