Is my fish having a spazm?seizure?

Question

i have a fish that has started having this weird behaviour. one side of his body will start spazming and his one fin will twitch all weird. its kind of freaky! is this a spazm or seizure??

Answer 1

Flush it.

Answer 2

what species of fish is it and what environment is it kept in?

shimmying and shaking can be a sign of an imbalance in electrolytes - this often happens when usually brackish fish such as mollies are kept in salt-free environments.