Chinese hi fin banded sharks actually aren't schooling fish. They are shoaling fish, which means that they form a very loose "school" while they forage and it only becomes tight knit when there is a predator hunting them (which doesn't happen much at all when they are 2 foot or larger). They can be raised just fine in very small groups (1-4) without any serious behavioral issues. However, without being raised in a large group, they don't pick up the shoaling/schooling mentality.