They have poison and there gills help them adapt to there environment.
gills, fins,
Mollusks: Snails use to just shut themselves up during tides but then got to moving around while the beach was still wet. From such evolved the land snails and slugs. Insects: having a water-proof...
Your question is the wrong way around. As life originated in water, amphibians evolved adaptations to live on land.
lets not say and say we did k DOUGIE SWAG