my angelfish died mysteriously

[Fishy89]

i got home from school today to check up on my 2 pregnant mothers. (1 guppy, 1 swordtail), and what do i get, 1 dead angelfish, and no babies. and reasons why he would die like that? all my other fish are fine.

 

[Shizat]

you have a lot of fish for a 10 gallon coming from your signature.

 

[Fishy89]

12 maybe, but the neons don really take up much space, they all stay in the corner at on time, so it looks like i have less fish