Cockle core shells may act like fiber optic cables

SFreeze oysters Their shells may be rare for humans to obtain, but these bivalve molluscs and their relatives, such as oysters and mussels, are eaten for a living. Most are filter feeders, ingesting microscopic organisms as well as debris from their aquatic environments. However, a handful of mollusc species have formed symbiotic partnerships with algae that live within their tissues. These individuals supplement their diet with sugars produced by their microscopic partners through photosynthesis.