Rhombeus V. Compressus I.D.

[Terricloth]

Wondering if there's a way to differentiate between the two from a young (2") size. and what differences there will be in size and shape.

 

[Fomoris]

If there are some points or bars on them, you can identify them :

Points : S. rhombeus
Bars (on the whole flanks) : S. compressus
Bars (not under the lateral line) : S. altuvie

But keep in mind that Serrasalmus are very difficult to ID when they are under 2-2.5"

 

[RhomBeusBoi]

Well Dogg, you know it aint a rhom if it has a red belly, that's fo sho!

 

[Terricloth]

I think the first reply was a little more helpful, thanks though!

 

[guppy]

I have a terrible time telling piranha apart and need pics so I can do a sibe by side comparison.

 

[shmeva_riles_7]

i have only seen 2 piranha's black piranha and a RBP and they are supper easy to tell apart.

 

[guppy]

Here is a pic of the compressus from a site called Angelfire, the other two are an adult and a juvie rhombeus from the Piranhasen site. none of the pics mentioned who took them.