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This shape, large size, and clarity of the tunic make this species a good one for studying tunicate structure and feeding. The pharyngeal basket fills the upper, expanded portion and the stomach, intestine, heart, and gonads are in the narrow stalk. The species is hermaphroditic: Usually an orange ovary surrounded by white testes can be seen in the stalk.
Look along the edges of the cluster for transparent stolons creeping outward. This is where new buds are being formed.
The amphipod Polycheria osborni may be found within the tunic.