So I look at my fish often. Like every hour of the day if I can and I’ve come home this evening to find all 4 of my male guppies and maybe 5/7 cardinal tetras have quite big bellies!! All seem pretty happy and active as usual except 1 guppy is obviously trying to poop and is being quite aggressive to the other guppies when they get close. Please help I really hope they’re not going to die as they are my 5 YO sisters pets and she was distraught when our fighter ate the cardinals and then died because of it. The photos are the best I could get as like I said they’re still active aha TIA
Hello and welcome to the forum! 
It’s just from them eating. My neons look like that every day after I feed them.
It’s just from them eating. My neons look like that every day after I feed them.
Ah Thankyou! I was worried about my guppies mainly because one was so big and was being aggressive to the others when they got close. Checked on them this morning and they’re all back to normal size! No food for them tonight!! Ahah
No problem! The guppies were probably acting aggressive because there was food available.
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