aggresion /guppies

[melissfish]

I had two guppies and a diamond tetra in tank for 1 week. today i found 1 dead guppy (the male) and it looks like something has eaten off his tail and had a few bites elsewhere. is there likely to be aggresion between these fish.

 

[Bearfan]

More likely than not, the took off some pieces after death.

 

[Apocalypse_Gold]

Tetra can be tail nippers but as Bearfan said, if it was dead for long any fish would have eaten its tail as an easy snack.