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Ocean crossword

Clues across and down, at three difficulties, and it prints with the answer key.

Play Ocean crossword online Make your own crossword
Ocean123456789101112131415

Across

  • 1 Tall brown seaweed forming underwater forests
  • 4 Eight-armed animal with three hearts
  • 6 Drifting tiny life that whales strain from the water
  • 7 River-like flow within the sea, like the Gulf Stream
  • 9 What makes seawater undrinkable
  • 10 Deep gash in the seafloor, such as the Mariana
  • 12 Sheltered spot where ships tie up
  • 13 Where land meets water
  • 14 Twice-daily rise and fall of the sea
  • 15 Largest creature on the planet

Down

  • 2 Biggest of the world's five great waters
  • 3 Playful marine mammal known for clicks and whistles
  • 5 Five-armed tide pool dweller that can regrow a limb
  • 8 Giant wave set off by an undersea quake
  • 11 Reef builder that is really a tiny animal

Print the page above, or take the easy grid as a PDF. Both carry the answer key, and large print is a setting rather than a separate file.

Show the answer key
Ocean1KEL2PA3D4OCTOPUSIL5SF6PLANKTONIHACI7CURREN8TNF9SALTIUSN10TREN11CH12HARBOROM13SHORE14TIDEA15WHALE
  1. 1 across: KELP. Tall brown seaweed forming underwater forests
  2. 2 down: PACIFIC. Biggest of the world's five great waters
  3. 3 down: DOLPHIN. Playful marine mammal known for clicks and whistles
  4. 4 across: OCTOPUS. Eight-armed animal with three hearts
  5. 5 down: STARFISH. Five-armed tide pool dweller that can regrow a limb
  6. 6 across: PLANKTON. Drifting tiny life that whales strain from the water
  7. 7 across: CURRENT. River-like flow within the sea, like the Gulf Stream
  8. 8 down: TSUNAMI. Giant wave set off by an undersea quake
  9. 9 across: SALT. What makes seawater undrinkable
  10. 10 across: TRENCH. Deep gash in the seafloor, such as the Mariana
  11. 11 down: CORAL. Reef builder that is really a tiny animal
  12. 12 across: HARBOR. Sheltered spot where ships tie up
  13. 13 across: SHORE. Where land meets water
  14. 14 across: TIDE. Twice-daily rise and fall of the sea
  15. 15 across: WHALE. Largest creature on the planet
Ocean123456789101112131415

Across

  • 3 Sheltered spot where ships tie up
  • 5 Giant wave set off by an undersea quake
  • 6 Deep gash in the seafloor, such as the Mariana
  • 7 Eight-armed animal with three hearts
  • 9 Drifting tiny life that whales strain from the water
  • 12 Playful marine mammal known for clicks and whistles
  • 14 Twice-daily rise and fall of the sea
  • 15 Largest creature on the planet

Down

  • 1 Biggest of the world's five great waters
  • 2 Reef builder that is really a tiny animal
  • 4 River-like flow within the sea, like the Gulf Stream
  • 8 Five-armed tide pool dweller that can regrow a limb
  • 10 Where land meets water
  • 11 What makes seawater undrinkable
  • 13 Tall brown seaweed forming underwater forests

Print the page above, or take the medium grid as a PDF. Both carry the answer key, and large print is a setting rather than a separate file.

Show the answer key
Ocean1P2C3HARBORCR4CIA5TSUNAMIFLRI6TRENCH7OCTOPU8SETN9PLANKTON10SR11SHFA12DOLPHINLRS13K14TIDE15WHALELP
  1. 1 down: PACIFIC. Biggest of the world's five great waters
  2. 2 down: CORAL. Reef builder that is really a tiny animal
  3. 3 across: HARBOR. Sheltered spot where ships tie up
  4. 4 down: CURRENT. River-like flow within the sea, like the Gulf Stream
  5. 5 across: TSUNAMI. Giant wave set off by an undersea quake
  6. 6 across: TRENCH. Deep gash in the seafloor, such as the Mariana
  7. 7 across: OCTOPUS. Eight-armed animal with three hearts
  8. 8 down: STARFISH. Five-armed tide pool dweller that can regrow a limb
  9. 9 across: PLANKTON. Drifting tiny life that whales strain from the water
  10. 10 down: SHORE. Where land meets water
  11. 11 down: SALT. What makes seawater undrinkable
  12. 12 across: DOLPHIN. Playful marine mammal known for clicks and whistles
  13. 13 down: KELP. Tall brown seaweed forming underwater forests
  14. 14 across: TIDE. Twice-daily rise and fall of the sea
  15. 15 across: WHALE. Largest creature on the planet
Ocean123456789101112131415

Across

  • 1 Twice-daily rise and fall of the sea
  • 5 Drifting tiny life that whales strain from the water
  • 7 River-like flow within the sea, like the Gulf Stream
  • 8 Giant wave set off by an undersea quake
  • 10 Biggest of the world's five great waters
  • 12 Floating marker that bobs to warn or guide
  • 13 Deep gash in the seafloor, such as the Mariana
  • 14 Tall brown seaweed forming underwater forests
  • 15 Largest creature on the planet

Down

  • 2 Playful marine mammal known for clicks and whistles
  • 3 Five-armed tide pool dweller that can regrow a limb
  • 4 What makes seawater undrinkable
  • 6 Eight-armed animal with three hearts
  • 9 Where land meets water
  • 11 Reef builder that is really a tiny animal

Print the page above, or take the hard grid as a PDF. Both carry the answer key, and large print is a setting rather than a separate file.

Show the answer key
Ocean1TI2DEO3S4S5PLANKTON6OAPACLH7CURRENT8T9SUNAMIFOHNI10PA11CIFIC12BUOYSUOR13TRENCHSR14KELPA15WHALE
  1. 1 across: TIDE. Twice-daily rise and fall of the sea
  2. 2 down: DOLPHIN. Playful marine mammal known for clicks and whistles
  3. 3 down: STARFISH. Five-armed tide pool dweller that can regrow a limb
  4. 4 down: SALT. What makes seawater undrinkable
  5. 5 across: PLANKTON. Drifting tiny life that whales strain from the water
  6. 6 down: OCTOPUS. Eight-armed animal with three hearts
  7. 7 across: CURRENT. River-like flow within the sea, like the Gulf Stream
  8. 8 across: TSUNAMI. Giant wave set off by an undersea quake
  9. 9 down: SHORE. Where land meets water
  10. 10 across: PACIFIC. Biggest of the world's five great waters
  11. 11 down: CORAL. Reef builder that is really a tiny animal
  12. 12 across: BUOY. Floating marker that bobs to warn or guide
  13. 13 across: TRENCH. Deep gash in the seafloor, such as the Mariana
  14. 14 across: KELP. Tall brown seaweed forming underwater forests
  15. 15 across: WHALE. Largest creature on the planet

About Ocean

The ocean covers most of Earth's surface and holds about 97 percent of its water. Sunlight reaches only the top few hundred feet, so the drifting plankton that feed nearly everything else stay near the surface, while trenches plunge deeper than any mountain stands tall. The Pacific alone is wider than every landmass combined. Tides rise and fall because the moon's gravity tugs the water, and a single dolphin may travel dozens of miles in a day following food.

Reach for this during a marine biology or earth science unit, or on the drive home from an aquarium visit.

What is in this crossword

An 18 by 15 crossword with 10 across and 5 down, on the subject of Ocean.

Grid
18 x 15
Across
10
Down
5
Longest answer
STARFISH (8 letters)

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