| Preface | 1 |
| Life | 1 |
| Life on Land | 3 |
| Life in the Ocean | 3 |
| Geography of the Ocean | 4 |
| Nutrients in the Ocean | 5 |
| Zones of the Ocean | 6 |
| Oceans of the World | 15 |
| Carbon Cycle and the Ocean: Nature’s Exchange of Life and Element | 15 |
| Phytoplankton: Microscopic Powerhouses of the Ocean | 17 |
| Zooplankton: Drifting Animals of the Ocean | 18 |
| Parts of a Fish: Form and Function Beneath the Waves | 20 |
| New Wonders of the Deep (2023–2025) | 21 |
| Atlantic Hagfish: Slimemaster | 24 |
| Barreleye: The See-Through Spectacle | 25 |
| Black Swallower: Eats Fish Larger Than Itself | 26 |
| Blobfish: A Gelatinous Mass | 28 |
| Bluefin Tuna: A Warm Blooded Fish | 29 |
| Blue Goo: What Are You? | 30 |
| Bluntnose Sixgill Shark: Sibling Rivalry to the Max | 31 |
| Chambered Nautilus: A Spit Machine | 33 |
| Coelacanth: Master of Chill | 35 |
| Cookiecutter Shark: The Bite-Sized Terror | 36 |
| Cuvier’s Beaked Whale: The Deep Diving Champion! | 38 |
| Deep Sea Anglerfish: A Light in the Dark | 39 |
| Deep Sea Coral: Nature’s Deep Sea Art | 40 |
| Deep Sea Dragonfish: Terrors of the Deep | 42 |
| Dumbo Octopus: Flappy Eared Wonder | 43 |
| Fangtooth: Tiny Terror with a Giant Bite | 45 |
| Firefly Squid: Light Show In the Sea | 46 |
| Flabby Whalefish: Transformers of the Sea | 48 |
| Frilled Shark: A Fossil With Fangs | 49 |
| Giant Isopod: Giant Deep-Sea Rolly-Polly | 50 |
| Giant Tube Worms: The Mouthless Marvels | 52 |
| Goblin Shark: Fish With an Electric Nose | 54 |
| Gummy Squirrel: Sea Cucumber That Looks Like Candy | 55 |
| Helmet Jellyfish: Glowing Red Helmet | 56 |
| Japanese Spider Crab: The Gentle Giant with Sticky Style | 58 |
| Lanternfish: Tiny Swimmers, Big Light Show | 59 |
| Long Nosed Chimaera: Jet-Nosed Ghost of the Deep | 60 |
| Mariana Snailfish: Champion of the Abyss | 61 |
| Marine Hatchetfish: Shadow Snatcher | 62 |
| Megamouth Shark: Eats Like a Whale | 64 |
| Oarfish: Sea Serpent of the Deep | 65 |
| Pompeii worm: The Hottest Home on Earth | 67 |
| Sea Angel: Winged Wonder | 68 |
| Sea Pig: Party Animal of the Deep | 69 |
| Sea Toad: Lure-Master of the Deep | 70 |
| Siphonophore: The Colony That Pretends to Be One Animal | 72 |
| Slender Snipe Eel: Duck Beak on a String | 74 |
| Sperm Whale: Deep Diving Mammal | 75 |
| Tripod Fish: Out of the Mud | 76 |
| Tube Worms: Methane Munchers of the Deep | 78 |
| Umbrella Mouth Gulper Eel: Huge Mouth | 79 |
| Vampire Squid: With a Cloak and Eyes That Glow | 80 |
| Viperfish: Fish With Fangs | 82 |
| Zombie Worm: Bone-Eaters of the Deep | 83 |
| Learning Activities | 85 |
| Predator/Prey Activity: A Game of Vibrations and Stealth | 85 |
| Water Pressure Activity: Deep Dive | 86 |
| Density Activity: Sink or Float? | 87 |
| Water Temperature And Density Activity | 88 |
| Glossary | 91 |
| IPA Pronunciation | 97 |
| Image Credits | 98 |