Some lineages remained or became secondarily fully aquatic with reduced limbs and elongated, eel-like bodies.

Some species of salamanders also hibernate during the winter, while other fully aquatic species remain active throughout the year.

Some salamander species are fully aquatic throughout their life, some take to the water intermittently and others are entirely terrestrial as adults.

These are perennial herbs, including some fully aquatic plants and some species that grow near water.

They are fully aquatic herbaceous plants with milky sap, becoming dormant during drought conditions.