Different animals adapt to the climate of their environment (eg thick fur, different coats for summer/winter, etc). But for the most part, fish look fundamentally the same (scales, fin placement, etc) across cold and warm water species whether salt, brackish or fresh water.
In: Biology
a cold water fish like trout excel in colder temperatures w/ efficient oxygen uptake & streamlined bodies while warm water fish, such as tilapia, are adapted to warmer temperatures with broader bodies & unique metabolic processes, helping them thrive in their environments.
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