Two huge sea turtles cross paths on the ocean floor as a batfish takes in the scene. Franco Tulli, Indonesia, 2022 Both silver and golden sweepers cover this coral reef. Mok Wai Hoe, Indonesia, 2020 ...

Something small, shiny and electric blue is catching beachgoers' eyes along the Texas Gulf Coast. Commonly known as a blue button (and scientifically known as Porpita porpita), these striking, ...