Betnacional

Betnacional is an offline reference: ocean life from the surface to the trenches.

• Fish — 17 species
• Mammals & reptiles — 16 species
• Invertebrates — 16 species
• Zones & habitats — 15 entries
• Glossary — 18 terms
• Quiz — questions built from the same entries
• Favorites — keep the entries you return to

Every entry has a short summary line and a few paragraphs of description. Search works inside each section. Nothing is downloaded: all 64 entries ship inside the app and work without a connection.

Betnacional covers the animals and environments of the ocean: sharks, rays and bony fish from the surface to the midnight zone; whales, seals, sea turtles and other air-breathing marine animals; the invertebrates that make up most of ocean life, from squid and corals to krill and tube worms; and the depth zones and habitats themselves, including hydrothermal vents, coral reefs, kelp forests and the deepest trenches. Each entry gives the scientific name, typical size and habitat, followed by a short description of anatomy, behaviour and ecology.

Entries were compiled from published marine biology references, museum and aquarium educational material and peer-reviewed survey results, with sizes and depths given as widely cited ranges rather than record values. This app is a general reference for study and curiosity; it is not a species identification key or a guide for diving, fishing or handling marine animals.

Recent changes:
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