A long way to grow!

  

Close-up of barnacles on a Californa Mussel (Mytilus californianus) shell, photographed on 29 April 2024.

There are at least two age classes of barnacles here — the larger Little Brown Barnacle (Chthamalus dalli) adults and the very tiny newly-settled recruits.  The recruits were so small they were actually hard to see in the field — just small specks scattered across the mussel shell.  They have a long way to grow!  :)