These are great little fish and yes similar to the Oto. I passed up a chance to have 2 of them and I reget not buying them right then and there. I went back the next day and they were gone .
They do well in groups or 2 or 3+ they can be kept alone but if you have room get 3. They are great little workers and so cute only getting 2 inches. DO not pass these little gems up.
Yes they get along with everyone that will not eat them.