Lead with obvious contrasts
Thresher tails and more standard cruising tails belong in the same explanation because the contrast helps readers faster.
Reference guide
Shark Tail Shapes and What They Help You Notice
Tail shape is one of the fastest ways to place a shark into the right part of the guide. This page gives that cue a dedicated home.
Tail cuesRecognition aidIndex now
Use tail shape for sorting, not ranking
This is a guide cue, not a drama device.
Support the compare pages
A tail-shape page makes thresher and mackerel shark comparisons easier to read.
Useful next pages
Keep moving through the field guide with the pages that make this one more useful.
Thresher Sharks
The clearest place where tail shape becomes the main recognition cue.
Shark Identification Guide
The larger workflow page this reference supports.
Thresher Tail Comparison
A visual page built around the same cue.
Keep the guide offline
Pocket Shark is built as an offline shark field guide for iPhone and iPad, so the same comparisons, glossary notes, and species context can stay with you away from a browser.
Get the field guide on the App Store