Dendronotus patricki is a species of sea slug, a dendronotid nudibranch, a shell-less marine gastropod mollusc in the family Dendronotidae.

[2] This species was described from a whalefall, a dead whale which was experimentally placed in Monterey Canyon, California at a depth of 1820 m (36°42′30″N 122°06′19″W / 36.70833°N 122.10528°W / 36.70833; -122.10528).

It was also seen on video from an ROV at another whalefall in Santa Cruz Basin, 33°29′40″N 119°22′04″W / 33.49444°N 119.36778°W / 33.49444; -119.36778 at a depth of 1676 m.[1] Dendronotus patricki is a translucent species of Dendronotus with no surface markings and a reddish-brown hue to the body.

[1] Dendronotus patricki was found crawling on a muddy seabed.

It is possible that it feeds on burrowing cerianthid anemones as does Dendronotus iris.