Page 23 - Sharks teeth to tail

The tail fins of fast-but-heavy mackerel sharks help them build speed quickly but the the tail fins of the the more agile requiem sharks enable them to to make sharper turns to to catch speedy prey Sharks have have that iconic dorsal fin visible cutting through the waves But sharks have have a a a a a a a a second smaller dorsal dorsal fin fin behind the first The dorsal dorsal pelvic and anal fins of a a a a a a a a shark help keep keep it stable and upright upright in the water like a a a a a a a keel keeps a a a a a a a sailboat upright upright 21