Phallusia mammillata – Britain's largest sea squirt

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Name a species competition : Phallusia mammillata
Name a species competition: Phallusia mammillata. Photograph: Paul Naylor/marinephoto.co.uk/Natural England

Description

A large sea squirt – up to 12 cm long

Ecology

Adult sea squirts have an unusual circulation system in which blood is pumped in one direction for several seconds and then in the opposite direction for the same length of time. This species has a tough, leathery "tunic" that is milk-white in appearance. It's the largest British sea squirt – large enough that small anemones can sometimes be found living on it.

Distribution

Found along the south and south-west English coast.

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Comments

206 comments, displaying oldest first

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  • BlondeLamb

    10 June 2011 12:13PM

    The holy ghost, it looks like Casper with a hole in the middle.

  • clb2011

    10 June 2011 12:39PM

    AC/DC squirt (because of the circulation thing)

  • Eduu

    10 June 2011 12:39PM

    Campfire Marshmallow Sea Squirt

    Campfire Marshmallow - becuase of the burnt marshmallow appearane (kudos: @funkyusername - love the burnt marshmallow idea which I've unashamedly stolen)

    But embellished with 'Campfire' to represent the small anemones that can sometimes be found on it.

  • TurnipTrumps

    10 June 2011 12:53PM

    The Monk-in-limbo. I always thought part of the fun of common names was making up stories about their origin and pretending they are true, and the idea that in the past people thought people in purgatory would look like this is one that seems worthy of spreading to me.

  • digit

    10 June 2011 1:31PM

    The Roiling Puffball Sea Squirt

  • theboj23

    10 June 2011 1:44PM

    This comment was removed by a moderator because it didn't abide by our community standards. Replies may also be deleted. For more detail see our FAQs.

  • execowboy

    10 June 2011 1:52PM

    Great white sea-squirt

    Weirdly sea squirts in their juvenile stages have a rudimentary backbone and look a bit like fish. It is as if they could not be arsed to evolve.

    Phallusia can often have the shape of large cock and balls, passes the time on a boring dive.

    I think I need to get a life

  • greenrosestormcloud

    10 June 2011 2:40PM

    this squirt reminds me of the waxy lustre that opal (a mineral) sometimes has...i live in south australia...97% of opal is produced in Australia and is its national gemstone...so i would call it...

    opal squirt

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