Are Glofish Aggressive Fish?
Are Glofish Aggressive Fish? Glofish tetras, danios, and barbs are schooling/shoaling fish. While they are sociable most of the time, they become aggressive when kept in numbers less than 5-6. Glofish bettas, especially males, are extremely territorial and aggressive. However, the ‘most aggressive glofish’ titleholders are glofish sharks. How do you deal with aggressive GloFish?