A field guide for divers

What species was that?

Scan your underwater photos and Loggerhead names the animals in them. Then log the dive and learn about the reef.

Loggerhead sea turtle, Caretta caretta

10,000+species ready for identification

1,800+dive sites and growing

20free scans to start

Scan your photos

Name the species you saw

Pick photos or videos from a dive. Loggerhead finds each animal, names it and shows how close the match is.

The review screen naming a splendid toadfish at 92% match, the diver’s photo beside the catalog photo

Log your dives

Import your paper logbook

Log each dive by trip: site, depth, time, gear and notes. Photograph a page of your paper logbook and Loggerhead fills in the dive details for you.

A paper logbook page being turned into a dive

Plan your next trip

Know when to go

Every destination has its dive sites on a map, the water temperature by month and the animals in season, from Bonaire to Raja Ampat.

The Mexican Caribbean in August: 30°C water and whale sharks in season

Daily quiz

Quiz yourself every day

One photo, two names. A daily quiz keeps your eye sharp between trips.

The daily quiz asking to tell two coral shrimps apart

Your feed

Get to know the reef

Your feed mixes your buddies’ dives with short cards on how big an animal grows, how to tell look-alikes apart and what is happening in the ocean. In light or dark mode.

The feed in dark mode: how big a spotted moray grows, 1.8 m, about three scuba tanks end to end

From our dives

A giant clam among pink and brown corals — Small giant clam · 92% match

A green sea turtle resting under a coral ledge — Green sea turtle · 90% match

A tarpon swimming beside a wreck — Atlantic tarpon · 80% match

Leemor underwater on a reef, smiling and giving the hang loose sign

“I kept surfacing from dives with photos of animals I couldn’t name. I just wanted an easier way to learn about what I saw, so I built Loggerhead.”

Leemor, founder of Loggerhead and rescue diver

You have the final say

Every name shows how close the match is, and you can change or remove it.

Share your dives with your buddies

Only buddies you add see them, and you can hide them any time.

Know what to keep clear of

Animals that can hurt you are marked, with what to watch for.

Giving back to the ocean

We give 2% of profit from in-app purchases to the Manta Trust, a charity that protects manta rays and the places they live.

Spot it. Scan it. Name it.

Free on iPhone and Android.