Freshwater Prawn vs Arowana

[WarrendaFish]

I just Got home from work to find a 2" freshwater prawn ( the biggest of 3) eating one of my two young Silver arowanas. The Arowana's are or were both about 2". There are othere young species in the tank:
2 silver dolaar-size blue discus (obviously not the culpret)
a 4" dinosaur eel (probably not it)
a 2" African Black Knife (seems pretty unlikely...?)
a 4" Transparent Knife ( also pretty skittish)
2 blue snails (highly unlikely)
and 3 prawns 2 1" and the main suspect... a 2"

did my Arowana meet his doom at the claws of an invertbrae?

Looking for a little closure...

Help me put the peices together so I dont make the same mistake twice...

 

[swede]

how big was the aro?

 

[WarrendaFish]

both aro's are 2"

 

[WarrendaFish]

When I got home the 2" prawn had the aro in his mouth and was half consumed....
the tip of the arrow's jaw was also missing.. I took what was left an inspected it thoroughly.. no other scratches or marks

 

[jwong1024]

i doubt it, young aros stay top water. prawns are bottom dwellers.

 

[WarrendaFish]

there are 2 tall plastic plants that reach the surface.....
Nobobdy else in the tank has a scratch...

I'm ready to feed the prawn to my Oscar

 

[Hao]

dont put arowanas with tankmates unless 5-6"+ b/c its still fragile

 

[Bderick67]

dont put arowanas with tankmates unless 5-6"+ b/c its still fragile

Possibly the prawn could just be cashing in on an opportunity. As Hao stated, best to keep baby aros without tankmates. There is a chance the aro could have been killed by the other aro.

 

[KuangMingJie]

I think this is a really rare case because a strength of a 2" aro is more then enuf to break free away from prawns unless its a crayfish.

The prawn must be on steriods...

 

[tunblue]

Possibly the prawn could just be cashing in on an opportunity. As Hao stated, best to keep baby aros without tankmates. There is a chance the aro could have been killed by the other aro.

i think it must be the other aro...n sorry fr your lost