''Balanus trigonus'' is a species of

barnacle A barnacle is a type of arthropod constituting the subclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive ...

in the family

Balanidae The Balanidae comprise a family of barnacles of the order Balanomorpha. As a result of research published in 2021 by Chan et al., the members of the family Archaeobalanidae were merged with this family. Genera These genera belong to the family B ...

. It is steep-sided, conical barnacle, has six shell plates and is pink in colour. They are opportunistic fouling organisms that are endemic to the Indo-Pacific region.

References

* Barnacles Crustaceans described in 1854 Taxa named by Charles Darwin {{Maxillopoda-stub