are these green balloons

are these green balloons

Observation - are these green balloons - Southern Africa. Description: So Trying to find out more about the algaes. we see a lot of these in the area and so far I've only had the two oceans to help me try figure it out.

So Trying to find out more about the algaes. we see a lot of these in the area and so far I've only had the two oceans to help me try figure it out.