What does the lair of a myriad of different fish mean?

The phrase "lair of a myriad of different fish" typically refers to a habitat or environment that is home to a vast variety of fish species. This could imply a rich and diverse ecosystem, such as a coral reef or a vibrant underwater landscape, where different fish coexist, each playing unique roles in the ecological balance. It highlights the complexity and interdependence of marine life within that setting.