I own two friendly 'tiels, and two mean ones. In their defense, both of the mean ones went through some serious trauma and I do believe suffer some kind of post traumatic stress. My female literally has nightmares and panic attacks, it's sad. Both are serious pluckers, while the friendly boys are not.
Just wanted to note, there is no species of fish that 'grows to fit the tank'. This is an urban legend and one that people LOVE to pass around as gospel. A fish, just like most any other creature on the planet (save a couple of reptiles and possibly some invertebrates), has a genetically predisposed size they grow to and then stop. Otherwise can you imagine the same species of fish in its natural lake, river, or ocean?
People love to say this about goldfish as justification for sticking them in small bowls, or for larger fish to justify sticking them in cramped aquariums. Truth is, the fish will grow until its environment forces it to become stunted and deformed, which drastically reduces it's lifespan.
It's kind of like sticking a german shepard puppy in a cocker-spaniel sized carrier and keeping it there permanantly under the belief the dog will only grow as large as its kennel.
Just wanted to note, there is no species of fish that 'grows to fit the tank'. This is an urban legend and one that people LOVE to pass around as gospel. A fish, just like most any other creature on the planet (save a couple of reptiles and possibly some invertebrates), has a genetically predisposed size they grow to and then stop. Otherwise can you imagine the same species of fish in its natural lake, river, or ocean?
People love to say this about goldfish as justification for sticking them in small bowls, or for larger fish to justify sticking them in cramped aquariums. Truth is, the fish will grow until its environment forces it to become stunted and deformed, which drastically reduces it's lifespan.
It's kind of like sticking a german shepard puppy in a cocker-spaniel sized carrier and keeping it there permanantly under the belief the dog will only grow as large as its kennel.
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