We have previously created two interactive art works inspired by a wiggling tentacle of the sea anemone and by grass blowing in the wind. Our first project is a plant-shaped robot called "Himawari." Our second project, titled "plant" is an interactive art that trembles artificial foliage. These works have shape memory alloy actuators we developed. In this paper, we introduce our latest work, an interactive art called "Tentacles," inspired by the sea anemone. It has 55 SMA (shape-memory alloy) actuators that we developed as tentacles. The slow movement of tentacles looks like the sea anemone dancing on the waves. "Tentacles" provides users with a comfortable interactive experience by synchronizing the light, sound and movement of tentacles, creating an otherworldly space. We discuss the expression of wiggling tentacles in the interactive art through design, implementation and exhibition of "Tentacles."