1. Tall structure with a light

2. State of being alone

3. Strong cord

4. Small shelter

5. One stranded on an island

6. Maritime disaster

7. Hard protective outer layer

8. Marine invertebrate

9. Skin damage from the sun

10. Activity of catching fish

11. Cold-blooded aquatic animal

12. Means of communication

13. Source of light and heat

14. Act of staying alive

15. Tropical fruit

16. Coastal bird

16. Granular material

17. Rise and fall of the sea

18. Place providing cover or protection