Glaucus atlanticus Forster, 1777

(Figure 36 H)

Material examined. Seven specimens. All found washed up on the beach in Zavora. MHN-YT68, 0 9 Jun. 2011, 18mm; MB28-004558, 0 4 Jun. 2012, 15mm, collected by A. Roseblum; MB28-004996, 5 spcs., 0 5 May 2015, 4– 12mm.

Habitats. Planktonic, in the subtropical zone. Found washed on the beach together with by-the-wind sailor ( Velella sp.) and bluebottle ( Physalia sp.).

Occurrences. Zavora.

Geographic distribution. Worldwide in subtropical regions (Churchill et al. 2013, 2014).