Difference between a Agassizi and a Gephyra

[Djall]

Hello,

Few days ago, I buy a Apisto. Agassizi.
In looking in the gallery, I see the Gephyra.
Now I'm not sure what kind of species, i buy.
What's exactely the difference between a Agassizi and a Gephyra?

Thank you.

PS: Trying to take a picture soon.

 

[Mike Wise]

I wrote this over 2 years ago, but it still is true"

The difference between A. gephyra & A. agassizii is not easy to determine. I have seen photos of fish from the middle Rio Negro, home to A. gephyra, that look more like A. agassizii. I have also seen photos of A. agassizii that show the lacy spotted pattern associated with A. gephyra.

So how do I decide? Well, on dead specimens I look at the breast area. A. gephyra has very few breast scales - similar to A. pertensis in this respect. On live specimens I look at the male's lateral band during threat display. On A. gephyra the lateral band is visible over its entire length from back edge of the gill cover to the root of the caudal fin. On A. agassizii the lateral band will be dark near the gill cover back toward the lateral spot. Then it fades noticably back to the caudal peduncle. From the caudal peduncle to the root of the caudal fin it darkens again. It is a good bet that if the fish shows the combination of a solid lateral band during threat display, a red margin on the dorsal fin, a tail fin with a narrow white submarginal band & lacy spotting inside the submarginal band, and fairly short tip on the dorsal fin, then it is A. gephyra. Their body color is usually not as bright either.

Brooding female A. gephyra in threat display also show a continuous lateral band, while similar A. agassizii females show only a large lateral spot. Like I said they can be hard to tell apart

 

[Djall]

Very interesting.
Thank you.

Trying to see the difference and i think it's a Agassazii.
I suppose a red/gold species.