Atlantic bottlenose dolphin (Tursiops truncatus), in training using only echolocation, Netherlands Antilles, Caribbean, Central America

Adult bull killer whale (Orcinus orca) surfacing in Chatham Strait, Southeast Alaska, United States of America, Pacific Ocean, North America

Olive ridley turtle hatchling, Lepidochelys olivacea, Costa do Sauipe, Bahia, Brazil (South Atlantic)

Olive ridley turtle hatchling, Lepidochelys olivacea, Costa do Sauipe, Bahia, Brazil (South Atlantic)

Fonualei South Volcano, Sonar Image

Volcano O, Lau Basin, Sonar Image

Photovoltaic cells, sonar panels mounted in a field, Oberruesselbach, Middle Franconia, Bavaria, Germany, Europe

Norderney sounding vessel in motion in front of Norddeich, special ship for surveying the navigable water in the Wadden Sea, Lower Saxony, Germany, Europe