AudCath Studios
OpenOcean

YOUR MARINE BIOLOGY FIELD STATION

A little
deeper.

A whole ocean of understanding.
One remarkable animal at a time.

Start exploring

Free to explore. No ads. No account.

Illustration of a humpback whale swimming beneath sunlit water
Humpback whale Megaptera novaeangliaeAI-generated illustration
30 animal field guides4,220 illustrated lessons*Your pace. Your curiosity.

LOOK CLOSELY. UNDERSTAND MORE.

Wonder is only
the beginning.

Go beyond an animal’s name. Follow the way its body works, how it grows, where it belongs, and how scientists learn about its life.

OpenOcean’s lined seahorse field guide, with illustrated lessons, topic navigation, and reading tools
The actual OpenOcean field guide. Choose a lesson, inspect its images, and follow the evidence.
01

Meet the animal

Find its place in the living world, from distinguishing features to evolutionary relatives.

02

Anatomy & physiology

Explore structure and function with visual studies and rotatable external-anatomy models.

03

Life cycle

Follow reproduction, development, growth, and the changing challenges of survival.

04

Habitat & food web

Connect an animal to its environment, its food, and the organisms that depend on it.

05

Marine research

Examine methods, interpret teaching datasets, and ask what the evidence can—and cannot—tell us.

THE LIVING COLLECTION

Thirty ways into the ocean.

From a sunlit reef to a deep-sea vent. Choose the animal that makes you curious.

Humpback whale Mammal · Open ocean Common octopus Cephalopod · Coastal waters Green sea turtle Reptile · Coastal waters Whale shark Fish · Open ocean Giant squid Cephalopod · Deep ocean Sea otter Mammal · Kelp forests Lined seahorse Fish · Shallow coastal waters Moon jelly Cnidarian · Coastal waters American lobster Crustacean · Rocky seabeds Staghorn coral Cnidarian · Caribbean reefs Common bottlenose dolphin Mammal · Coastal and offshore waters Harbor seal Mammal · Temperate coasts Emperor penguin Bird · Antarctic seas Oceanic manta ray Fish · Tropical and subtropical seas Clown anemonefish Fish · Indo-Pacific reefs Green moray Fish · Atlantic reefs and mangroves Common cuttlefish Cephalopod · Coastal seabeds Ochre sea star Echinoderm · Pacific rocky shores Giant clam Bivalve · Sunlit tropical reefs Giant tubeworm Annelid · Deep-sea hydrothermal vents Killer whale (orca) Mammal · Seas worldwide Dugong Mammal · Seagrass meadows Leatherback sea turtle Reptile · Open ocean Chambered nautilus Cephalopod · Indo-Pacific reef slopes Peacock mantis shrimp Crustacean · Tropical reefs Atlantic horseshoe crab Chelicerate · Atlantic coasts Purple sea urchin Echinoderm · Pacific rocky reefs Antarctic krill Crustacean · Southern Ocean California sea hare Gastropod · Pacific shallows Giant barrel sponge Sponge · Caribbean reefs

Collection artwork is AI-generated interpretation, not documentary photography. Image credits and scientific sources are available in the app.

FROM READING TO REASONING

Think like
a marine biologist.

Explore the field guides

Follow the evidence.

Read source-linked lessons. Practice interpreting observations, separating a result from an explanation, and recognising uncertainty.

Make connections.

Compare animals side by side. Investigate ocean foundations and research activities with clearly labelled teaching data.

Keep your questions.

Save animals, track lessons you’ve read, and write your own learning notes. Export your notebook to keep a backup or move devices.

A FEW PRACTICAL DETAILS

Made for curiosity.
Built to stay quiet.

Where can I use OpenOcean?

OpenOcean runs in a modern web browser on desktop, iPhone, and iPad. You can add it to your Home Screen on supported devices. There is no separate App Store download.

Does it work offline?

Yes, after the app finishes its first download and shows that it is ready offline. The illustrated collection is a substantial download. Use Wi-Fi for the first visit and allow it to finish before going offline. External research links still need an internet connection. Browser storage can be cleared or evicted; export your notebook for safekeeping.

Who is it for?

Curious children, teenagers, educators, and grown-ups. Start with an overview or explore the more detailed physiology and research lessons. It is a learning companion, not a certified school curriculum; younger readers may enjoy exploring with an adult.

Are the illustrations and models scientific evidence?

No. They are learning aids. AI-generated illustrations and artist-built 3D models help explain ideas but are not specimens or research measurements. Documentary images are credited separately. Each lesson links to its sources and distinguishes established findings from open questions.

Where do my notes go?

Notes, saved animals, and reading progress stay in this browser. OpenOcean does not require an account or include advertising or analytics. Use Notebook to export or import your notes; there is no automatic cloud sync.

There’s a whole ocean.

Start with one animal. See where your curiosity takes you.

Open OpenOcean

*4,220 lessons across thirty field guides; illustrations support related lessons and are not unique to every lesson.