top pred of amazon

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erk419;4431583; said:
Depends on if schools count, because if they do hands down the piranha. Even the biggest catfish wouldn't stand a chance against a school of these!


agreed and I dont think arapaima cause they dont have teeth of any sort they are big tho. depends would it be 1v1 or schooling fish vs solitary?
 
candirus are pretty scary someday i will urinate in the amazon and see the awesome power of this catfish
 
Piraiba Catfish (Brachyplatystoma filamentosum)

Maximum Length: Up to 9-½ feet
Maximum Weight: Over 500 pounds

The Amazon's Largest Catfish: The piraiba boasts the title of largest catfish in the Amazon River, and it has a sordid reputation for biting off more than it can chew (or, in this case, swallow). The piraiba's massive mouth can measure more than 40 centimeters (nearly 16 inches) across. Fishermen have found monkeys, large birds, cats, dogs and even other catfish inside of these massive animals, indicating that the piraiba happily scavenges dead creatures in the water.

Maneater or Misunderstood? One particularly gruesome tale recounts that a fisherman dove down to untangle a net and never emerged from the water. His fellow fishermen found his body hours later when a giant piraiba floated to the surface in distress. Only the fisherman's legs were visible, protruding from the piraiba's mouth. Fishermen in the Amazon respect the piraiba as a worthy adversary, noting that the powerful piraiba can drown a wrestling fisherman by dragging him to the bottom of the river. Still, power and a notoriously voracious appetite do not necessarily make the piraiba a river monster prone to attacking and preying on live humans.

piraiba-catfish-324x205.jpg

Credit for info and pic goes to
http://animal.discovery.com/fish/river-monsters/piraiba-catfish/
 
balton777;4432617; said:
Piraiba Catfish (Brachyplatystoma filamentosum)

Maximum Length: Up to 9-½ feet
Maximum Weight: Over 500 pounds

The Amazon's Largest Catfish: The piraiba boasts the title of largest catfish in the Amazon River, and it has a sordid reputation for biting off more than it can chew (or, in this case, swallow). The piraiba's massive mouth can measure more than 40 centimeters (nearly 16 inches) across. Fishermen have found monkeys, large birds, cats, dogs and even other catfish inside of these massive animals, indicating that the piraiba happily scavenges dead creatures in the water.

Maneater or Misunderstood? One particularly gruesome tale recounts that a fisherman dove down to untangle a net and never emerged from the water. His fellow fishermen found his body hours later when a giant piraiba floated to the surface in distress. Only the fisherman's legs were visible, protruding from the piraiba's mouth. Fishermen in the Amazon respect the piraiba as a worthy adversary, noting that the powerful piraiba can drown a wrestling fisherman by dragging him to the bottom of the river. Still, power and a notoriously voracious appetite do not necessarily make the piraiba a river monster prone to attacking and preying on live humans.

View attachment 527300

Credit for info and pic goes to
http://animal.discovery.com/fish/river-monsters/piraiba-catfish/

  1. I go with this catfish.
  2. That is a simple village myth. River Monsters is 90% telling stories, 10% actually seeing the fish.
 
candirú, more of a parasite than a preditor but that little fish makes me shudder.
 
i'm surprised no one has mentioned the payara. but i'm going with the bull shark. they're the biggest and most unpredictable fish in the amazon
 
Surely all predators are experts in there field. For me:

Humans
Otters
River Dolphin
The Big Cats, Cichlids & Characins etc.....

Most of them will eat dead or live fish so the preds are also scavengers.

They are all awesome in there own way, I guess to judge the most predatory fish would be the fish that has the most succesful kill/to attack ratio and for me the Ara's will probably win that due to vacuum they create when hunting. I saw video of a wild Ara that swallowed a big Geo type fish whole, and the Ara was maybe 12" away before when it open its mouth the Geo went in like water through a plug hole.

Its a fish eat fish world.....
 
MonsterFishKeepers.com