Zebra Danios Becoming Very Fat

[t4ppo]

Hi, i have 5 Zebra danios in my community tank, And just recently the last couple of days 3 of them have become Extremely fat! Only 3 of them though, and they all seem to eat the same, Today i have noticed it more because they are bulging out at the bottom today on there bellies,

Is there something wrong with them?

Thanks.

 

[t4ppo]

Hi, i have 5 Zebra danios in my community tank, And just recently the last couple of days 3 of them have become Extremely fat! Only 3 of them though, and they all seem to eat the same, Today i have noticed it more because they are bulging out at the bottom today on there bellies,

Is there something wrong with them?

Thanks.

Also the fins on the fattest one seem to be all very opened up, they look bigger than usual,