Biogeographic distribution

E. obtusa observations are limited, with 6 observations recorded with the Global Biodiversity Information Facility. These occurrences (Figure 1) were observed at Heron Island, French Polynesia, Japan and Vanuatu. Figure 2 displays the occurrences of all Elysiidae animals, with the largest abundance of animals in equatorial zones, which is likely due to limitations of the availability of algal prey species. 

Figure 1. Global occurrences of Elysia obtusa (Global Biodiversity Information Facility 2014).

Figure 2. Global occurrences of Elysiidae (Global Biodiversity Information Facility 2014).