The reef he was used to seeing had been the most beautiful in all of Hawaii, he told CNN. “It was an incredible garden of corals with thousands of multi-colored fish.” But now, all of it was gone.

They then used artificial intelligence to analyze reef map images at about a 2-meter resolution, or about 6.5 feet, and 16-meter, or 52.5-feet, depth, according to the study.

Researchers said Honaunau Bay now has an average of 51 sea urchins per square meter. This is considered to be the highest recorded density on coral reefs anywhere in the world.

In addition to posing a threat to swimmers, sea urchins in this popular snorkeling and diving spot in Hawaii are also harming the local ecosystem.

Rainbow Reef is a 166,000-gallon aquarium stocked with 1,000 reef fish, almost all of them Hawaiian species. With a solid diet and highly filtered water, the lagoon is an idyllic, stress-free ...

As a marine biologist studying Hawaiian reef fish all throughout the Hawaiian chain, I like how the Hawaiian people have named their fish species. The Hawaiian name has a meaning, which often ...

If the fish you caught was black with orange eyes, it would have probably been kole. There are no regulations on the size caught with maturity for females at 3.3 inches and males at 3.9 inches.

When coral reef ecologist Randall Kosaki and a team of scientists arrived by boat at a well-known coral reef near Hawaii this month, they had to “double-check their GPS,” he told CNN.