Halocynthia aurantium

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Halocynthia aurantium
Halocynthia aurantium (Pallas, 1787).jpg
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Tunicata
Class: Ascidiacea
Order: Stolidobranchia
Family: Pyuridae
Genus: Halocynthia
Species: H. aurantium
Binomial name
Halocynthia aurantium
Pallas, 1787[1]

Halocynthia aurantium, or sea peaches, are a species in the order Stolidobranchia, making them a sub-classification of tunicates. Sea peaches are commonly found in the northern Pacific ocean, ranging from the Arctic Sea south to Puget Sound, and most common in the Bering Sea at a depth of 40 to 100 metres. The sea peach is typically barrel shaped, growing to a height of 18 centimetres, and its body is attached directly to the substrate. It is usually red or orange with a smooth or wrinkled tunic. There are two siphons at the top.[2] The sea peach is preyed upon by crabs and sea stars.[3]


  1. ^ Halocynthia aurantium - (Pallas, 1787) World Register of Marine Species. Retrieved 2011-11-12.
  2. ^ Halocynthia aurantium ZipCodeZoo. Retrieved 2011-11-12.
  3. ^ "The Alaska Fisheries Science Center: Sea Peach". Retrieved 2007-12-10.