Fingernail clams are filter feeders, meaning they take in oxygen and small pieces of organic matter (pieces of leaves and mini plankton) and release waste and indigestibles.
They like water that is rich in calcium. It helps them to build stronger shells!
They are a hermaphroditic and asexually reproducing species, meaning they self fertilize.
They have a lifespan of 1-2 years.
They survive winters and dry spells by retreating up to 8 inches into the mud.