Oh cool, thank you so much. Would you happen to know what species they are? Obviously it doesn't make any difference to me but I find it super interesting. I have the option of buying some arnoldi at the moment which I may go for just to have some variety.

Hi all. So I just bought 4 otocinclus from my lfs (I will be adding 4 more next week). I was wondering if anyone could ID the species please. One seems to have a solid thick black line and the others it goes thinner before the tail splotch. Do I have more than 1 species or are they the same but just ...