The spikey sea slug is the nudibranch Phidiana milleri. It was recorded in Wellington Harbour by Jean Roger, via iNaturalist CC BY-NC-ND 4.0Read more
The spikey sea slug is the nudibranch Phidiana milleri. https://www.inaturalist.org/observations/114093958 It was recorded in Wellington Harbour by Jean Roger, CC BY-NC-ND.