Secrets of the Atlantic Depths
Like Duolingo, but for Secrets of the Atlantic Depths. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A deep dive: 88 levels across 5 sections, about 176 minutes end to end, roughly 35 days at five minutes a day. It moves through Mastering the Coastal Hunt, Navigating the Great Blue Highway, Life in the Midnight Zone, The Science of Atlantic Giants, and The Invisible Engine of the Ocean. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in Secrets of the Atlantic Depths
- Crabs keep their gills wet by storing a small amount of water in a chamber
- Warm water cannot hold as much dissolved oxygen as cold water
- Moist gills allow oxygen to pass into the blood even when out of the ocean
- Metabolism speeds up in the heat, making animals use oxygen faster
- How tide pool animals manage oxygen during low tide
- The impact of solar heating on tide pool chemistry
- Suction prevents being swept away by the surf
- Shells act as armor and seal in vital body moisture
- Heavy shells act as ballast to keep the hunter from being tossed
- Armor allows the hunter to stay active while waves are hitting
- Small pockets of water heat up much faster than the open ocean
- Evaporation makes the remaining water saltier over time
- Land-based predators can reach tide pools at low tide
- The sequence of environmental stress as the tide recedes
- Small water volumes fluctuate wildly in temperature and salt
- Matching physical traits to their survival purpose in the surf
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Secrets of the Atlantic Depths the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What happens to the oxygen levels in a tide pool as the afternoon sun warms the water?
Get it right to open this lesson and 87 more in the app.
Where Secrets of the Atlantic Depths takes you
Move beyond basic fish facts to discover how Atlantic creatures survive extreme pressures and navigate vast migrations. Master the art of identifying complex behaviors and the hidden connections between the surface and the abyss.
- 1
Mastering the Coastal Hunt
- Tide Pool Tactics: Survival in the Shifting Shallows
- The Ambush Experts: Camouflage in Kelp and Sand
- Cooperative Killers: How Pods Coordinate Attacks
- The Shell Game: Advanced Defense for Soft Bodies
- 2
Navigating the Great Blue Highway
- Magnetic Maps: How Sea Turtles Find Home
- The Vertical Commute: Why the Ocean Moves at Night
- Thermal Regulation: Staying Warm in Frigid Currents
- Whale Songs: Communication Across Thousands of Miles
- The Sargasso Sea: A Floating Nursery for the Lost
- Drafting and Drifting: Energy-Saving Travel Tricks
- 3
Life in the Midnight Zone
- Living Light: The Mechanics of Biological Glow
- Pressure Proofing: How Deep-Sea Bodies Don't Collapse
- Finding a Mate in Total Darkness
- 4
The Science of Atlantic Giants
- Filter Feeding: The Efficiency of the Largest Mouths
- Apex Predators: The Trade-offs of Being at the Top
- Gigantism: Why Some Species Grow to Massive Sizes
- Longevity Secrets: Sharks That Live for Centuries
- The Scavenger Economy: What Happens During a Whale Fall
- 5
The Invisible Engine of the Ocean
- Plankton: The Tiny Powerhouse of the Food Web
- Symbiosis: Partnerships That Defy the Odds
- Ocean Conveyors: How Water Movement Dictates Life
- The Carbon Cycle: How Marine Life Breathes for the Planet
5 sections · 22 units · 88 levels. Built to play, not to enroll.
You pick the voice
Secrets of the Atlantic Depths is taught in the The Bestie style: your friend who just gets it. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Secrets of the Atlantic Depths today.
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