Off-color fish poop !!!

[baby bass]

about 5 mins ago my fish pooped bright yellow no joke!!!
is this bad

 

[Laticauda]

What foods are you feeding? Are there any plants in the tank it could have eaten?

 

[baby bass]

frozen krill but it has never done this and i have been feeding my bass this for months

 

[SCGeordie]

I picked up two Boesemani Rainbowfish on Sunday from a Petsmart that I haven't been to before - a friend called me from there to tell me about them cos they were older and better coloured than the ones Petsmart usually sells. After they got settled in I was sitting by the tank and noticed one of them swimming by 'mid poop', the poop was the brightest green I have ever seen with a bright red 'bobble' at the end(thought it was something else at first till it 'dropped off').