Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth that regrow throughout their lives. But changes in the ocean's chemistry could put those weapons at risk.

A group of shark enthusiasts and scientists is hoping to make Maryland the first state in the nation to have a state shark.

Naylor and others cautioned that ocean acidification is indeed going to pose many threats to the ocean beyond just sharks.

Sharks Losing Teeth In this undated handout photo provided by Heinrich Heine University Duesseldorf in January 2026, a blacktip reef shark swims at Sealife Oberhausen in Oberhausen, Germany.

This is read by an automated voice. Please report any issues or inconsistencies here. PORTLAND, Maine — Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth ...