Catfish have whiskers on their face that resemble felines called barbels. These are used for taste and touch to navigate in darker waters and find food. Catfish can tolerate a wide range of conditions, including saltwater, freshwater, a mix (brackish), just above freezing, and up to around 100 F. This is one reason why they are great for aquaculture (fish farming). Catfish are the #1 fish used for farming in the US, accounting for 59% of fish sales in 2023. They like to lay their eggs in cavities, so people will often give them boxes or cans to use. Catfish have whiskers on their face that resemble felines called barbels. These are used for taste and touch to navigate in darker waters and find food. Catfish can tolerate a wide range of conditions, including saltwater, freshwater, a mix (brackish), just above freezing, and up to around 100 F. This is one reason why they are great for aquaculture (fish farming). Catfish are the #1 fish used for farming in the US, accounting for 59% of fish sales in 2023. They like to lay their eggs in cavities, so people will often give them boxes or cans to use.