Why did amphibians lose? All other vertebrates are either more effective on land or water, but cannot live smoothly in both. Only amphibians can hunt, nest, mate, fight, run, swim on both land and water very easily. Still, they never managed to diversify into too many species and they got sidelined by all other classes of chordates after the carboniferous.

>>16729961 (OP)
Basically, Amphibians don't have enough protections from environmental hazards.

They're stuck in between two phases of evolution, and radiation and toxicity mutate their genes a bit too fast.

They don't have protection from pointy things.

They don't have protection from solar radiation or venoms.

They just mass reproduce and then die off when a drought spell hits.

>99.99% of species go extinct.

Frogs are just a failed path of evolution.
>Good for food though

>>16729961 (OP)
>Only amphibians can hunt, nest, mate, fight, run, swim on both land and water very easily.
This is bad
They can't compete with fish in water or with land animals on land and thus suck at both.

>>16729961 (OP)
>lose
They seem alive to me. That's an evolutionary success.
>they never managed to diversify into too many species
Apparently there was no need.
>got sidelined
What do they care?