thalassic

adjective

1. of or relating to seas and oceans.
2. of or relating to smaller bodies of water, as seas and gulfs, as distinguished from large oceanic bodies.
3. growing, living, or found in the sea; marine.

adjective

1. of or relating to the sea
2. of or relating to small or inland seas, as opposed to open waters
3. inhabiting or growing in the sea; marinethalassic fauna

1. Relating to seas or oceans, especially smaller or inland seas.
2. Relating to rocks formed from sediment that has been deposited on the ocean floor.