Crystal Dolphin is one of Engelwood's best-known tracks, released during the late 2010s rise of vaporwave and future funk online. Engelwood, a producer known for sampling older funk, soul and city pop records, built a following on streaming and video platforms with short, loopable instrumentals. The track spread as background music for edits, vlogs and aesthetic posts, where its breezy, nostalgic feel fit perfectly. It remains popular because it is instantly recognisable, easy to loop, and carries a summery mood without any lyrics getting in the way.