Sirens are usually found near coral formations, jumping out of the water or following boats. You can befriend a wild mermaid by giving them a sea pickle, they will jump and leave behind few tokens. The siren charm can be used to summon a Siren and if used on Prismarine it will transform in a Siren Shrine. Tamed sirens can change colors if you give them kelp or corals.

The Shrine will slowly generate fishing loot items over time, asking for source after each cycle. The number of items and chance of getting a treasure will increase if many different water animals and plants are near the Shrine. You should build an aquarium or pond around the Shrine, to let your sirens have fun. [Note: it will take some time to update the score].