Shark Anatomy Diagram - Key External Features Explained #1944253 (License: Personal Use)

This diagram presents the external morphology of a typical shark, divided into head, trunk, and tail regions. Key structures include the spiracle behind the eye, five gill openings, two dorsal fins (the first with a spine), pelvic and pectoral fins, and sexual dimorphism indicated by the male clasper. The caudal fin features a prominent caudal keel and precaudal pit, important for hydrodynamics.

Used in educational contexts such as marine biology textbooks, online learning modules, museum exhibits, or aquarium signage to help students and visitors identify and understand shark morphology. Matches user intent for academic study, species identification, or科普 outreach.