Invisible Oceans Founder's Collection: Invisible Oceans #73: Porpita VII

Extreme close-up of one of the pale Porpita morphs, clearly showing the brown symbiotic algal areas and isolated algal cells close to the edge of their host's disc. Notice, too, the knob-like stinging terminations to the tentacles that are in view.

Lizard Island, Australia (2003)

Nikon F3 | Custom Optics | Fuji Velvia