How aggressive are S. Franciscanus dorado

[Nick Park]

As a fish keeper who is a Church bishop in my day job, I'm probably the only person reading this thread who gets amused by the fact that an aggressive fish gets named after St Francis.

 

[Mister-Blister]

In my humble opinion, you have done a great job supporting your statements. Thank you. It makes me a bit sadder I had to kill mine off. Oh well. If I get the license, I will try again, this time with a good size school.

I have not found my dorado to be this bloodthirsty creature these links depict. It was not that big though, only 2 feet and 5-6 years old.

When someone speaks of aggression without any qualifiers, I personally would like to gain clarity first what aggression they are referring to. Predatory aggression can be mitigated by proper feeding and by choosing large and robust tank mates or the ones that are aggressive territorially or hierarchically. Territorial and hierarchical aggression is mitigated by a careful choice of tank mates.

In the example above, the Jibran (headbanger) crenicichla's territorial aggression is probably what overcomes dorado's predatory aggression or the known nippiness and otherwise nuisance behavior, it's hard to think about feeding when the feed is attacking you...

Anyhow, this is all fun and dandy but I think you'd agree that the no amount of reading and generalized considerations can take place or overcome a thorough, grounded, and long term firsthand experience. The latter is heavily favored on the MFK, is what I have been trying to tell you too.

as i mentioned, dorados at a younger age are not super territorial. not to mention that aquarium raised one=/=wild dorado. their behavior is as much affected by age as it is by the environment they live in. most captive dorados never get the chance to properly hunt large prey, cannibalize, fight, etc.

As a fish keeper who is a Church bishop in my day job, I'm probably the only person reading this thread who gets amused by the fact that an aggressive fish gets named after St Francis.

who knows if the old man had some sich sword skills under his belt

 

[Chicxulub]

Viktor makes good points here (like usual) in that if you're going to argue a point in MFK, it's a good idea to bring sources to that argument. It's also generally a good idea to take the advice of people who have actually kept the species in question, as a fish's reputation in the wild can be wildly different from their actual disposition.

at least brevis have piranha-like pack mentality so there should not be much issues with keeping them together

Nooooo

Brevis are not a schooling species. They're not a species to play nice. Forskahlii are the Sahelian species that forms vittatus like packs.

Very much true. But i wager they are easier to keep than goliaths, at least based on tank requirements.

As a fish keeper who is a Church bishop in my day job, I'm probably the only person reading this thread who gets amused by the fact that an aggressive fish gets named after St Francis.

Technically it's named after the Rio Sao Francisco, not St Francis directly

 

[Mister-Blister]

Viktor makes good points here (like usual) in that if you're going to argue a point in MFK, it's a good idea to bring sources to that argument. It's also generally a good idea to take the advice of people who have actually kept the species in question, as a fish's reputation in the wild can be wildly different from their actual disposition.



Nooooo

Brevis are not a schooling species. They're not a species to play nice. Forskahlii are the Sahelian species that forms vittatus like packs.



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my bad on the first part, but the fish in that pic likely only weighs half as much as large goliath would, still a huge margin