I stopped to watch him for a bit. He browses much like a cow on a hillside. Lick, swallow, lick, swallow, move on a small step, repeat. With each bite, his mouth opens, exposing the radula for a half a second, as scratchy as a cow's tongue. It scrapes from front to back and closes down again.
I took a few photos, trying to capture that split second when the radula is exposed. Not quite. But in a few of the photos, I noticed the pattern the limpet was creating.
|The algae is splotchy where he hasn't fed yet, stripy where he's been.|
|Zooming in. See the radula tracks?|
|Zooming in still more. Each little scratch is about as long as the distance from the mouth to the back of the radula slit.|
He's harbouring a few copepods; the shell is not clamped down tight to the glass unless he's disturbed, as when I clean around him.