Would you say Musky? 

Warmouth Perch lol

I'd say bass because no fish has ruined more days for me than that critter!! LOL

Payara or Pacu, both eat piranha and anything else in the water.

Tom

Bluegill used to nibble at my toes when I was swimming. If they were bigger they'd rip me limb from limb like they do crickets and as they're trying to do when they bite a soft plastic.

The Pacu likes to snack on testicles, that is a mean fish!

Tom

I was thinking, maybe bluegill, also.  Not sure about their actual disposition, but I've had 5 inch bluegills smack 8 inch worms hard enough for me to think it was a multi-pound bass.  But, I think my testicles are safe....I now must vote for Pacu...and find a way to erase that mental image....thanks, Tom

What about the Goliath Tiger Fish? I saw that river monster episode where he caught a huge one and it blew my mind how big and scary those things looked...

The Pacu likes to snack on testicles, that is a mean fish!

Tom

There is nothing that's gonna top this... I shall fear the Pacu from now on!

that pike that took my new jig 

Tiger shark. Pound for pound, bluefish.

 

https://youtu.be/2O9uLiacnFU

bluefish. I know of two in the chesapeake bay that have tasted human blood. almost ate them out of spite.

 

I guess i deserved it though, stabbing a hook through their face and forcing them to the surface to suffocate for a few minutes for my 2 minutes of entertainment. fishing is fun!

How about that catfish in S America that swims up the urethra and extends its fins? Man that would suck!

 

https://en.wikipedia.org/wiki/Candiru

To me a pickerel that inhaled my CRANKBAIT then tried to bite me while trying to get my lure back. He kept on Snapping his jaws. I figure the pike and muskies have the same pit bull attitude.

+3 on the bluefish.   It's the only fresh or salt water fish I've ever seen that will actually watch your hands and try to bite you when you get close enough.  And it has one heck of a bite.  

 

Tight lines,

Bob

Blue fish will bite your finger right off.

Smelt, if they amounted to any size they would be kings of the ocean.

Only fish to ever bite me are bluegills . They use to bite my nipples . lol lil basstards .

Snakehead?

I'd say either Pacu or goliath tigerfish

Only fish to ever bite me are bluegills . They use to bite my nipples . lol lil basstards .

 

 

I seriously wish I didn't read that. 

Freshwater: Easily snakehead. There are videos on youtube of them destroying similar sized pike in a fight.

 

Saltwater: Bull Sharks are really ferocious

+3 on the bluefish.   It's the only fresh or salt water fish I've ever seen that will actually watch your hands and try to bite you when you get close enough.  And it has one heck of a bite.  

 

Tight lines,

Bob

I've had chain pickerel do this before. Can't argue with how mean a bluefish is though.

green sunfish. If they got any bigger they might start eating peoples dogs