Complex sentence: These crinoids can live on either rocks or soft sediment, and can move around using their cirri as feet, or can swim by beating their arms; they are suspension feeders, choosing locations with strong currents and extending their arms to catch plankton floating past.
Split into simpler sentences: These crinoids can live on either rocks or soft sediment, and can move around using their cirri as feet, or can swim by beating their arms. They are suspension feeders, choosing locations with strong currents and extending their arms to catch plankton floating past.