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Parmarion martensi. (A) eggs and neonates. Eggs are about 2.5 mm in diameter. (B) Adult with yellowish-brown flattened fingernail-shaped shell visible on the dorsum. The distinct keel along the posterior dorsal midline helps distinguish this species from similar-looking species in Hawai‘i. (C) Adult with shell covered by mantle folds. Adults are about 5 cm in length.
