Solitary fish do not live in groups or schools but are typically found swimming or hunting alone.

Solitary fish are fish species that prefer to live alone or in small, loosely associated groups. Unlike schooling fish that form large, tightly organized groups, solitary fish often maintain a certain distance from other individuals of their species.

Here are some reasons why fish might choose a solitary lifestyle:

• Territoriality: Some fish defend a specific territory for resources like food or breeding sites. This can lead to a solitary existence as territorial disputes can be aggressive.
• Predation avoidance: Being alone can reduce the chances of being detected by predators.
• Resource availability: The distribution of food or other resources might make it more efficient to live alone.
• Breeding habits: Some fish have specific breeding behaviors that require solitude, such as building nests or engaging in elaborate courtship rituals.

Examples of solitary fish include some species of catfish, cichlids, and eels. However, it's important to note that the behavior of fish can vary depending on factors like habitat, food availability, and social interactions.

Solitary fish is a term used for fish living alone, not in groups or schools. As example I could list: Betta Fish, Lone Wolf Fish, pufferfish, grouper or catfish and many others.

The term of solitary fish refers to species of fish that typically live alone rather then the schools or groups. These fish may prefer to establish their own territory, often exhibiting behaviors associated with solitude.