Marine Pictolife guides are waterproof, plasticized field guides covering over 250 species across various global regions, designed specifically for underwater use by divers and snorkelers. While primarily sold as physical books, digital previews and document versions of titles like the Mediterranean Sea guide are available, such as

The guide is ideal for "spotting" during a dive. You can reference the five or six phyla indexes (grouping stationary and mobile species) to quickly find the creature you just saw. Reviewers often recommend them for both beginners and experienced divers because they eliminate the need to memorize names in multiple languages while traveling.

The "PDF" format has made these guides universally accessible. Instead of carrying a heavy waterproof book, divers and students can load a Marine Pictolife PDF onto a tablet, smartphone, or e-reader inside a waterproof case.

• Visual appearance (shape, color patterns, fins)
• Habitat (reef, open ocean, benthic zone)
• Common name vs. scientific name cross-referencing