Fishyfanatic
Aquarium Advice Addict
The agressiveness can become an issue because the Yellow Lab's aren't very aggresive. Just be sure not to put anything too aggressive in the tank. In regards to the post about 10-12 Yellow Labs, you could have 8 Yellow Labs and maybe 4 Johanni's. Just be sure to have more female's than males when you have more than 2 of each.