The best replacement for catfish is tilapia.

The best alternatives to catfish are rated as following:
★★★★★  tilapia
★★★★  bullhead
★★  cod
★★  channel catfish
★★  bass
★★  flounder
★  fox
★  bat
★  carp
★  hito
★  trout
★  red snapper
★  swai
★  flathead catfish
  eel
  whiting
  blue catfish
  bullhead catfish
  flathead
  crappie
  piranha
  dogfish
  no catfish
  loach
  bullhead fish

Your alternative for catfish is not listed? Suggest!
Speaking about catfish, one probably shouldn't forget about african cichlids.

Other search terms related to catfish and their ratings are:
★★★★★ african cichlids
★★★ cichlids
You have in mind a companion for catfish and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of catfish in all years. Click on graph for more.
catfish
tilapia
bullhead