A Barnicle attached to a piece of a crab leg/claw.
Northern Acorn Barnacle (Semibalanus balanoides), Bush Terminal Piers Park, Sunset Park, Brooklyn, NYC, April 2024
Northern Acorn Barnacle (Semibalanus balanoides), Bush Terminal Piers Park, Sunset Park, Brooklyn, NYC, April 2024
Small black dots seem to be some kind of mollusc burrowing or drilling into the barnacle shells.
Shelling at Miami Beach for the City Nature Challenge. I collected this one a little before 6:30PM.
All of my shell observations from this visit:
https://www.inaturalist.org/observations?nelat=25.939479151190326&nelng=-79.11891051308922&on=2024-04-29&place_id=any&swlat=25.599382324071946&swlng=-80.30680724160484&term_id=17&term_value_id=19&user_id=joemdo
More details in general about my 2024 City Nature Challenge:
https://www.inaturalist.org/journal/joemdo/93673-city-nature-challenge-2024