Sand dollars and their relatives (clypeasteroids, cassiduloids) have a bilaterally symmetrical test composed of TEN double columns of plates, five interambulacral columns (labelled 1-5) and five ...

Tar has been spotted at Cannon Beach and Lincoln City as well as in southern Washington. So far, a source has yet to be identified.

Sand dollars and their relatives (clypeasteroids, cassiduloids) have a bilaterally symmetrical test composed of TEN double columns of plates, five interambulacral columns (labelled 1-5) and five ...