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Souvik Nag
Oscars have high personalities & they are known to be very aggressive fish. They require a strong filtration system with nutritious food.
Tank Size: 70-100 gallon
Size: 10-12 inches
Tank Size: 100-180 gallon
Peacock bass is one of the most aggressive fish. They have tendencies to jump. A strong filtration system is required to handle huge bioload.
Size: 10-12 inches in aquarium
Tank Size: 120-180 gallon
To reduce aggression between tank mates ample space is required for red terrors. The tank should be long rather than tall.
Size: 12 inches
Tank Size: 250 gallon
Silver Arowanas are one of the most predatory fish. Despite being a aggressive one, they can be kept with other big fish that have high personality.
Size: 3 feet
Tank Size: 70 gallon
Common pleco shows its aggressive nature when it attains adulthood. In most cases, they remain peaceful despite being big fish. Tank condition matters here.
Size: 12 inches
Tank Size: 90-150 gallon minimum
Adult bichirs are quite big compared to other freshwater aquarium fish. So any fish can't suit with them. Moreover, they are carnivores. So ample space is required.
Size: 1-2.5 feet
Tank Size: 500-650 gallon
Despite being a huge size, black pacu isn't so aggressive. Black pacu has strong jaws but still, they aren't considered big predators.
Size: 3 Feet
Adult jaguar cichlids are quite big & show aggression to their timid tank mates. The fish that are big & have personalities are the suitable tank mates of them.
Tank Size: 70-100 gallon
Size: 14-16 inches
Size: 18-28 inches
Tank Size: 200 gallon
Giant Gourami is a good community tank fish. However, males can show aggression & fight sometimes. A smaller tank is strictly not recommended.
Tank Size: 300-600 gallon
As a whole Iridescent Shark is a peaceful fish & rarely shows aggression towards tank mates. They are skittish in nature too. But a big tank is required to keep them.
Size: 4.3 Feet
Tank Size: 1500-2000 gallon
Redtail Catfish is one of the most opportunistic predators. Due to this nature, they show aggression. They show territorial nature too.
Size: 6 Feet