- The OK gesture or OK sign or ring gesture (symbol/emoji: “👌”) is performed by joining the thumb and index finger in a circle, and holding the other fingers straight or relaxed away from the palm. Commonly used by scuba divers, it signifies “I am OK” or “Are you OK?” when underwater. In most English-speaking countries it denotes approval, agreement, and that all is well or “okay”. In other contexts or cultures, similar gestures may have different meanings including those that are negative, offensive, financial, numerical, devotional, political, or purely linguistic.
- Class Gastropoda (digitalatlasofancientlife.org)
Gastropods are the second largest class of animals (after the Insecta)—with 40,000–90,000 living species and at least 13,000 extant and fossil genera (Ponder and Lindberg, 2020)—and are also one of the most evolutionarily successful groups in the variety of ecosystems and habitats that they occupy.