Sea lions are known for learning flipper clapping as a trained behaviour in zoos and aquariums, often paired with barking for food rewards and audience shows. Short clips of the behaviour spread widely on social media because the motion closely mimics human applause, making it a natural reaction sound online. Creators reuse it instead of stock crowd applause when they want praise to feel small, sincere and a little silly, especially in animal videos, family clips and lighthearted edits shared across platforms today.