Sea crossword #1 (level 3)

Across

5. 5 Tower that guides ships at night. (10 letters)
9. 9 It holds the boat in place. (6 letters)
10. 10 Plant that grows in the sea. (7 letters)
12. 12 Big shellfish with claws. (7 letters)

Down

1. 1 The biggest animal in the world. (5 letters)
2. 2 It swims and breathes underwater. (4 letters)
3. 3 See-through animal that stings. (9 letters)
4. 4 Half girl, half fish. (7 letters)
6. 6 It has eight arms. (7 letters)
7. 7 Water rolling onto the beach. (4 letters)
8. 8 It walks sideways. (4 letters)
11. 11 Explores the bottom of the sea. (5 letters)