Yes, fish can swim alone. Some examples of non school fish are: Barracuda Flatfish, and many more.
Do puffer fish travel alone or in groups?
Herrings do not swim along, they swim in great big schools, with fish numbering in the millions.
Individual fish are safer from a predator if swimming in a shoal, than if they are swimming alone.
Yes they do swim alone for food because more light is better but more mouths to feed.
many animals do such as crocodiles bears or otters
Yes fish can swim.
the little fin helps the fish to push its self foward the common house fish can not swim like a shark (swaying back and forth with no little fin) it pretty much means that without the little fin the fish will not be able to swim so the whole thing is the fins on a fish do not work alone they work as a team.
Fish can swim in any direction.
A catfish would be an example of a fish that can swim.
to help the fish swim and float
No. Some fish, such as several species of shark, prefer to swim alone. This is mainly the predatorial kinds of fish, and the only time they are ever together as during mating season.
the only fish that doesn't swim is none. only the mudskipper can go on land