DSC_4761 Horse mussel, or hururoa (Atrina zelandica) NZ's largest bivalve. A thin brittle shell with lines of hollow spines radiating out towards the posterior end of the shell, that help anchor it in the mud. Spring low intertidal to subtidal, lives buried for most of its length in mud or silty sand. Victory Beach, Otago Peninsula
DSC_4745 Horse mussel, or hururoa (Atrina zelandica) empty shells among drift. This is NZ's largest bivalve. The lines of hollow spines radiating out towards the posterior end of the shell help anchor it in mud or sand. Spring low intertidal to subtidal, where it lives buried for most of its length. Victory Beach, Otago Peninsula *
DSC_4749 Horse mussel, or hururoa (Atrina zelandica) empty shells among drift. This is NZ's largest bivalve. The lines of hollow spines radiating out towards the posterior end of the shell help anchor it in mud or sand. Spring low intertidal to subtidal, where it lives buried for most of its length. Victory Beach, Otago Peninsula
