MY ANSWER IS:
1.Star + fish -> Starfish.
2.Sea + horse -> Seahorse.
3.Ship + wreck ->Shipwreck.
4.Drift + wood ->Driftwood.
5.Sea + bed -> Seabed.
6.Jelly + fish -> Jellyfish.
7.Sea + weed -> Seaweed.
8.Under + water -> Underwater.
9.Sea + shell -> Seashell.
10.Sting + ray -> Stingray.
