I am having trouble identifying my otos, although I've looked through the cat e-log.
Here is one; I am thinking of otocinclus sp.(1) or maybe vittatus?
And these ones; I was thinking of oto macrospilus, but I have read somewhere that their black caudal stain is double, whereas they have one single spot; could they be hoppei? But they have no red reflections on them:
Thanks for your help
