A glob of naturally occurring tar or asphalt floating on the ocean surface. This tar is created when the hydrocarbons emitted by natural oil and gas seeps reacts with the sun.
From 2013 07-29 SB Channel
Glob of asphalt tar floating on surface.
From 2011 03-05 SB Coast
Natural Seepage: Oil and tar slick line.
Hubble telescope image of a nebula, or a severe storm system in the night sky?
It's actually mousse, a frothy mixture of oil and asphalt tar on the ocean surface at natural oil seep in the Santa Barbara Channel.
From 2010 04-04 SB Coast
Snowy Egret (Egretta thula) gives a "high five." (It looks like tar stains on its flanks).
From 2010 01-16 SB Channel