South american lungfish but they arent often available and when theyare they are alwys small around 3-4". And they are hard to raise at that size. I have a 20" West african lungfish in a 5x2x2 with some medium oscars, baysnook and dollars hes fine although he did take out a dollar, depends on the lungs temprement.
the fish i have that it would have to live with are one clown knifefish, one silver arowana, two oscars, two clown loaches, one fire eel, and one sun catfish. do you think any of those fish might cause problems with a lung.
Actually lungfish really should be kept in a species only tank.Often other tankmates
have been known to bother the rather inactive lungfish often nipping off the pectoral fins-Anne
the fish i have that it would have to live with are one clown knifefish, one silver arowana, two oscars, two clown loaches, one fire eel, and one sun catfish. do you think any of those fish might cause problems with a lung.
most people seem to mix oscars and lungs well and perhaps the aro since its a top feeder but unless your tank is quite large i would stick with keeping him on his one