Life came on land from river estuaries

Brian G Turner

Fantasist & Futurist
Staff member
Nov 23, 2002
A study comparing isotopes in fossil tetrapods to modern animals suggests the first creatures to walk on land lived in river estuaries: Stable isotopes suggest earliest tetrapods were euryhaline creatures

A team of researchers from several institutions in France and China has found evidence that some of the earliest creatures to walk on land likely emerged from estuaries or deltas. In their paper published in the journal Nature, the group describes studying certain stable isotopes in fossil specimens to determine the salinity in which they lived.
And here's an impression of a 1.5m Ichthyostega, along with further info from Wiki:

Ichthyostega - Wikipedia