What's The Most Aggressive Fish You've Housed?

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A group of Syncrossus Helodes, (Banded Tiger Loach). I bought five juveniles.
They grew incredibly fast & at the four inch mark began to mercilessly chase the Salvinis & Rivulatus. At five inches the Tigers became absolutely lethal. I couldn't get rid of them fast enough.
On line info suggests that the Helodes Botia can reach twelve inches & is a thick loach. A definite no buy.
 
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Blood Parrot, well I mean as far as aggression it runs high with this one. As for damage dealt my the BP it’s almost nothing minus stress.
Chased every smaller fish to the point of starvation and subsequent death.
My Texan cichlids aren’t a passive when it comes to a fight but they will sure hold their own.
 
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fishhead0103666 said:
Mine is pretty tame in comparison but either my green Severum or fire mouth, both are only what you’d consider barely aggressive. They aren’t peaceful enough to coexist with tetras but won’t kill another fish, they’re just pushy and like their space.
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Hmmm, All my severums have been barely aggressive too, and Iwouldn't really be concerned about keeping them with tetras that were big enough to not fit in their mouths.

Except when they were trying to breed. And I've had a lot of them try to pair up and breed. PITA LGBTQ cichlids....
 
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fish aggressive - gold spot severum - a - pipe!

human aggressive - aimara and sanchezi - low tolerance for items in their environment
 
Hands down my pink female parrot Patch (6-7"). She's bitten holes in nets, takes dive bombs out of buckets, and scrapes her teeth against the siphon, slamming it against the glass. Her aggression is beyond lunacy. She also glass bangs her tank lid for fun. Sometimes she pops it all day. If you don't intrude her space she's playful, interactive and calm. Put your hand in there and she flips the switch.

She's beaten up all my other parrots before (including my other severely aggressive female Kong, who beat up the same group). She also nailed my Oscar when he was a juvie at 6". Just buck wild.
 
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FINWIN said:
Hands down my pink female parrot Patch (6-7"). She's bitten holes in nets, takes dive bombs out of buckets, and scrapes her teeth against the siphon, slamming it against the glass. Her aggression is beyond lunacy. She also glass bangs her tank lid for fun. Sometimes she pops it all day. If you don't intrude her space she's playful, interactive and calm. Put your hand in there and she flips the switch.

She's beaten up all my other parrots before (including my other severely aggressive female Kong, who beat up the same group). She also nailed my Oscar when he was a juvie at 6". Just buck wild.
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....has she broken any tank heaters?
Jexnell said:
My Amphilophus Saggitae Casper for sure. Won't live with anyone else or it's fight night. I have to net him just to clean the tank or suffer his wrath
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I've been bitten by fish before and had wounds to show for it that is awesome!
 
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Dalfrey86 said:
Blood Parrot, well I mean as far as aggression it runs high with this one. As for damage dealt my the BP it’s almost nothing minus stress.
Chased every smaller fish to the point of starvation and subsequent death.
My Texan cichlids aren’t a passive when it comes to a fight but they will sure hold their own.
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Same with my BP's. Chases all the other fish everywhere, but he's lazy so eventually he'll stop, never to death.
 
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I think with parrots it depends on if they were dominant when added. Mine is mean, but both in the store and in my tank he never was the dominant fish. It curbs his aggression enough, but he is relentless once a fish shows signs of weakness.
 
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