Will different species of loaches interact and shoal with each other? Specifically yoyo and zebra loaches. Ive had a single yoyo loach for probably over 2 years now in my 20 gallon, its not an ideal situation but i had to rescue him and this was the best i could do and i just love him. Im getting a bigger tank and obviously im gonna move him into there when all is ready, but im not sure i could get an entire shoal of them due to their size. Mine is a little more than 5 inches and extremely active, and im not sure that would work. So i was wondering if i could a shoal of some smaller loaches, such as zebra loaches. Ive read theyre a little less high strung and around 3.5 inches. Would my yoyo become part of their shoal at least a little? I know it wont be as close as a shoal of his own, but i also know how social and funny and interactive loaches are. Would that be alright?