Life Beneath the Surface
Like Duolingo, but for Life Beneath the Surface. 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 short one: 9 levels across 2 sections, about 18 minutes end to end, roughly 4 days at five minutes a day. It moves through Reading the Water and The Balance of the Deep. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Life Beneath the Surface
- Sunlight warms the top layer of water more than the bottom
- The shoreline provides shelter from land plants and shallow water
- Water naturally separates into layers with different characteristics
- Nutrients wash in from the land, feeding the base of the food chain
- The deepest parts of a pond are consistently the coldest
- Shallow water allows light to reach the bottom for rooted plants to grow
- Recognizing the distinct vertical zones of a water body based on environmental conditions
- Understanding why the shoreline (littoral zone) has the highest biodiversity
- Warm water is lighter and floats on top of dense, cold water
- Aquatic plants need light to produce energy
- These layers don't easily mix, creating a physical barrier
- Water absorbs and scatters light, making it darker as you go deeper
- Oxygen comes from the air at the surface, while nutrients sit on the floor
- The depth of the 'growth zone' depends on how clear the water is
- Understanding how thermal stratification prevents the mixing of oxygen and nutrients
- Identifying light as the limiting factor for aquatic plant growth
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 Life Beneath the Surface 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.
Why do small fish often congregate near the pond's shoreline rather than the open center?
Get it right to open this lesson and 8 more in the app.
Where Life Beneath the Surface takes you
Discover the hidden neighborhoods of ponds, lakes, and rivers. Learn to read the water and understand the delicate balance that keeps aquatic worlds thriving.
- 1
Reading the Water
- Seeing the Pond as a Neighborhood
- The Invisible Engine of Life
- 2
The Balance of the Deep
- Keeping the System in Check
2 sections · 3 units · 9 levels. Built to play, not to enroll.
You pick the voice
Life Beneath the Surface is taught in the The Professor style: clear, structured, thorough. 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 Life Beneath the Surface today.
Download Tomo, search Life Beneath the Surface, and play your first lesson in under a minute.