Across
- 4. skeletal material of colonies of small sea polyps
- 5. a shallow place in waters caused by coral or rocks
- 7. one employed to safeguard, protect, and save bathers from perilous situations or drowning
- 8. a seabird with webbed feet
- 9. the land along the edge of water
- 10. having great extension downward or inward
- 12. a sudden painful contraction of muscle
- 14. a structure with powerful light for guiding ships
- 15. sky covered partially with clouds
- 17. a flattened appendage on various parts of the body of many aquatic vertebrates used for propelling, steering,
- 18. an optical instrument for seeing long distances
- 19. a J-shaped tube for breathing while the face is submerged
Down
- 1. an implement used to carry water, sand, etc.
- 2. a source of danger
- 3. a thin sac on the skin containing serum, as from a burn
- 5. not deep
- 6. a circular or conical shaped float that signals danger
- 11. contamination; man-made impurities and waste
- 13. balancing
- 16. the alternate rising and falling of the sea