Hello,
I recently got into aquascaping and started experimenting with small plant-only tanks last december. Two days ago, I felt my biggest tank so far was ready for some fish, so I headed to my local shop, and settled on getting silvertip tetras using the aquarium coop care guide. The shop had a big tank with a single label for silvertip tetras and two types of fish that looked pretty distinct. I assumed that was the difference between males and females. I asked the clerk for 10 silvertip tetras, 4 males and 6 females. Keep in mind I'm good with plants but know very little about fish yet so I just let the clerk pick them.
Now that they've colored back up in my aquarium and that I looked up how to tell apart silvertip males and females, I see that I have 7 silvertips and 3 fishes that I really think are something else. If they were getting along I wouldn't mind at all and just leave it at that, but the three slightly larger probably-not-silvertips are constantly darting around the tank, bullying each other and scaring the actual silvertips into hiding. Could anyone here help me ID the bullies? I attached a picture, not very clear but that's really the best I can do right now.
They have no clear silver tips
Shorter dorsal fin
Two bright horizontal stripes on the tail, a few bright dots on the side
Not much of a black spot on the tail
The shop had around 30 of these with a dozen silvertips, they were schooling and not aggressive at all
Any suggestions on how to handle them are appreciated, I'm not sure if I can accommodate them better or if I should return them to the shop. Thanks!