#phaeophyte

[frumpytaco]

Cystosphaera jacquinotii, a fucoid alga native to the Antarctic peninsula.  The spherical structures are pneumatocysts, or floats which keep the lamina elevated in the water column and exposed to light.  The clustered fingerlike projections are receptacles, which contain reproductive structures (antheridia and oogonia).  Not a kelp!   Photo by Chuck Amsler.