Most Aggressive Aquarium Fish. The Aquarium trade has been flourishing for an extended amount of time but selllers have been getting pretty reckless with what theyve been selling to both experienced and unknowing experts and beginners alike. It comes from India and usually its sold at its full size of about 25 cm.
This is a freshwater fish and the most aggressive of the aggressive freshwater fish species. More than 30000 different species ply Earths oceans and bodies of fresh water. But it all comes down to your fishs temperament and aggression levels.
Although most aggressive fish species cannot live with other fish species in an aquarium without fighting they can live peacefully in small same-species groups.
Siamese fighting fish more commonly known as bettas have a reputation for. Gouramis come in many color varieties such as the Blue Gourami above and the very popular Flame Dwarf Gourami. A sandy substrate is also essential since Bichirs can injure themselves on gravel while scavenging for food. Red-Bellied Piranha The Red-bellied Piranha is the most aggressive member of the Piranha family.