How predatory are Krobia xinguensis?

[fishdat]

I'm considering some as the centerpieces in my 90 gallon (72"x18"x16") that is stocked with around 30-40 tetra (Hyphessobrycon wadai, hyphessobrycon sp. blue ribbon, and pseudochalceus kyburzi) and around 20 ambastaia sidthimunki. I'm hesitant to introduce the krobia as it would be a quite unfortunate to lose the somewhat rare and expensive stock to predation.

What are peoples experience with this species?

 

[ryansmith83]

They are acaras so they’ll eat anything small enough to catch and fit in their mouths. Get larger tetras that are deeper bodied and they should be okay.

 

[duanes]

Agree
A friend kept a group in the tank below, with these tetras and no problems.

To help approximate size, the Tomocichla tuba in the shot is about 10", the krobia not that far behind.
In nature the Krobia are thought to eat mostly invertebrates, and although they are really not piscivores, in that size tank, bite size tetras could easily be cornered and picked off

 

[fishdat]

Agree
A friend kept a group in the tank below, with these tetras and no problems.
View attachment 1475529
To help approximate size, the Tomocichla tuba in the shot is about 10", the krobia not that far behind.
In nature the Krobia are thought to eat mostly invertebrates, and although they are really not piscivores, in that size tank, bite size tetras could easily be cornered and picked off

Those must be absolutely massive krobia, I've only heard of them reaching 5".

The tetra I'm keeping are 2"-2.5" in size, so not quite bite sized, but still not as sizeable as those Hyphessobrycon anisitsi pictured.

 

[duanes]

Many times when size is listed, SL (standard length) is used, meaning not including the tail.
I should have specified TL (total length) which includes the tail.
They were adult fish, about the size of an adult mans hand.
What I consider a medium cichlid.