Fish are always on the move, darting in and out of focus. While portraits can be challenging, these tips will help you take photographs that truly stand out.

Cool critters and hot colors are signatures of British Columbia’s superlative scuba diving. Hundreds of dive sites await in the emerald seas surrounding 300-mile-long Vancouver Island.

For years, Mexico’s Isla Guadalupe has been a dream destination for shark lovers. That dream is no more; the Great White cage diving hot spot has been permanently closed to tourism.

Antarctica and its ocean have long-intrigued explorers, scientists, fishermen and those bitten by the extreme environments travel bug.

New scientific evidence suggests that fish like to play in the same way that puppies, humans and other species do. Further studies are needed to confirm the hypothesis.

Founder of Sanriku Volunteer Divers, Hiroshi Sato is committed to cleaning natural-disaster debris, leading seaweed restoration efforts and training the next generation of mission-driven divers.

Observations and photos donated by visiting scuba divers helped researchers estimate the record population around Isla de la Plata.