iPhone Screenshots


Updated September 2021. Covers 361 fish seen by scuba divers (and all fish seen by snorkelers). Flip through screens like pages of a book, or find a fish quickly by color or shape. Up to 5 photos per fish -- showing juveniles, males, females, color variations. Videos for each fish too! And now, sharpen your fish ID skills with the new flashcard-style Quiz Mode.

- Targeted to scuba divers and advanced snorkelers.
- 361 species / 950+ photos
- Identify fish by color, shape, family group, name (common, scientific, or Hawaiian).
- Videos of all fish (requires internet)
- Flashcard-style quiz mode.
- Links to Fishbase and Reef.org for each fish.
- Logbook: save fish, add notes, share Logbook.
- Works great on iPads too.

Created by John Hoover, author of Hawaii's best-selling marine life ID books: The Ultimate Guide to Hawaiian Reef Fishes, and: Hawaii's Sea Creatures, a Guide to Hawaii's Marine Invertebrates. Check them out on Amazon.

What’s New

Version 3.3

Some scientific names updated, that's all.

Ratings and Reviews

5.0 out of 5
6 Ratings

6 Ratings

Crwik ,

Makes it fun and easy to ID reef fish

We’ve really enjoyed using this app during a weeklong trip to Maui. The pictures and videos are excellent. Organization is great. It’s fun to see the Hawaiian names for all the fish. And it’s nice to be able to log and export or share our notes for the fish we see. It includes some notes on habitat, diet, behavior, and identification for each fish. For example, I was trying to ID a particular Goatfish that didn’t quite match the pictures and names. Then I noticed in the description for the Squarespot Goatfish that the dark spot on its side sometimes disappears.

Teun64 ,

Great app for snorkeling and scuba

If you are planning to snorkel or scuba anywhere in Hawai’i, this is an awesome app to have. The app is very comprehensive, intuitive, and easy to use. The photos and videos are great for identifying each species. Identification is made easier by filtering based on color, shape, name, or common species. The descriptions provide just the right amount of detail as well as some interesting tidbits about behavior and ecology for each species. Everyone wants to know what they are seeing under water and having this app doubled the fun of our snorkeling trips!

ImperialPlanetologist ,

When ya gotta know that fish!

Saw a fish snorkeling in Maui I could not for the life of me find anywhere to identify, and I’ve got some serious search engine mojo. Was driving me nuts, so bought this app and found it quickly. Love that I can snorkel and come back to review what I’ve seen.

App Privacy

The developer, John P. Hoover, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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