Scientists have recently discovered a rare bright orange sailback shark off the coast of Costa Rica. This species, characterized by an unusually large dorsal fin, was first described in 1973, with no subsequent records until this recent sighting. Meanwhile, researchers have raised concerns about the increasing acidification of the oceans, which is causing unprecedented damage to shark teeth. Reports indicate that sharks are experiencing tooth corrosion, including holes and cracks, a phenomenon that could become widespread within the next 300 years. This dental degradation among sharks serves as an alarming indicator of the deteriorating health of marine ecosystems due to ocean acidification.