https://seaslugforum.net/find/polysp3
The Sea Slug Forum - Polycera sp. 3.
See polysp.htm message below.
the seaslugforumsp
https://ns-mollusca.linnaeus.naturalis.nl/linnaeus_ng/app/views/species/taxon.php?id=121751
Macrobenthos of the North Sea - Mollusca: Polycera dubia
of thenorth seamolluscadubia
https://litoraldegranada.ugr.es/el-litoral/el-litoral-sumergido/fauna/moluscos/gasteropodos/heterobranquios/ringipleura/nudipleura/doridida/doridoidei/polyceroidea/polycera-faeroensis/
Polycera faeroensis