Ischadium

Ischadium is a monotypic genus of mussels in the family Mytilidae. The sole species is Ischadium recurvum, known as the hooked mussel or bent mussel. It can be found along the Atlantic coast of North America, ranging from Cape Cod to the West Indies. They are often found growing on eastern oysters, either intertidally (south of the Chesapeake Bay, where exposed oysters can survive the winter) or subtidally. They also attach to other hard substrates, including artificial reefs and dead shells of the brackish water clam Rangia cuneata.

Predation

Ischadium detects predators primarily through scent—either that of the predator itself or of nearby dead bivalves. The primary predators of hooked mussels include the blue crab (Callinectes sapidus). Ischadium recurvum typically grows on eastern oyster (Crassostrea virginica) reefs, which are commonly found in estuarine conditions in the Gulf of Mexico.Ischadium is a favored prey item due to its macronutrient richness. Compared to other mussels, such as Mulinia lateralis, it contains larger amounts of crude proteins, lipids, ash, and gross energy regardless of the season. It also contains more magnesium, iron, zinc, copper, and manganese than other comparable mussels.