Seaweeds are any of numerous marine algae,such as a kelp,rockweed,or gulfweed.

海指任一种海生类，如大型褐、岩石或马尾。

Seahorses like to live in shallow waters amongst the seaweed and eelgrass.

海马喜欢住在海或鳗草丛中的浅海。

The seaweed felt cold and slimy.

海摸起来冷冰冰黏糊糊的。

Macroscopic algae, commonly referred to as macroalgae or seaweeds, are large plant like structures commonly found in coastal waters worldwide.

肉眼可见的海是指大海和海草，是世界各地海岸水域的见大型植物。