Friend or Foe

Discussion in 'ID Needed' started by sunburst, 21 May 2007.

  1. sunburst

    sunburst

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    Removed fromm some new acro (this weekend) Acro was showing tissue damage close to base. Dispatched to Valhalla
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  3. Mekaeel

    Mekaeel Moderator MASA Contributor

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    tagging...i usually see acros with these little guys in them
     
  4. viper357

    viper357 Admin MASA Contributor

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    the first one looks like a normal acro crab to me
     
  5. Alan

    Alan Admin MASA Contributor

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    Hi Sunburst, i have had the little black and white one also cause trouble on my acro's. I am not that familiar with acro crabs and dont know the good from the bad so i removed all of them.
     
  6. phat

    phat

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    yeah the top one looks exactly like the one i got!!

    never had hassle with him
     
  7. irie ivan

    irie ivan MASA Contributor

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    Pic 1 harmless, Pic 2 harmful. Actually breaks off calcites and eats them!
     
    Last edited: 22 May 2007
  8. Dober Man

    Dober Man

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    They pretty cute crabs though.
     
  9. phat

    phat

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    so what you saying then is i need to get him my acro? he's been there for over a year and no damage?
     
  10. Dober Man

    Dober Man

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    There are some crabs that have a symbiosis with corals, and therefore live peacefully with them.
     
  11. phat

    phat

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    yeah i am awares, but mine is exactly the same as the one in pic 1
     
  12. Dober Man

    Dober Man

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    Well if he hasn't done anything funny yet, why would he start now?

    I'd keep him.
     
  13. phat

    phat

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    lol does anyone have an id for that crap?
     
  14. sunburst

    sunburst Thread Starter

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    Thank you Mr Irie Ivan Sir.
    Your comment certainly saved a coraL.
    On Saturday (after loosing to the bulls) i was staring into my tank,... once again,... easing the pain... swallowing gulps of beer; when i noticed two acro growth tips that looked as though they had been crushed.
    I immediately thought that the only fish with the jaw power to do that was the Fox Face. Since then i have been scheming of a way to ditch him and maybe recover some of my expense....Step 1 buy fish trap... bought fish trap ... step two.... too lazy...rather check if any body has id my crabs on MASA

    And thats when i read "and eats them"

    Acro Specimen removed.... This ugly b......found and dispatched. I tried to take a pic of the damaged tip but came out a little overexposed.
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    This is the third crab of the same genus that i have found.... with a wake of damage. They are very difficult to see as they only come out to feed at night and hunker low down in the branches during the day.
     
  15. irie ivan

    irie ivan MASA Contributor

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    Siht just re read my post, really sorry guys: pic1: harmless, pic 2 harmfull

    That is exactly the way they feed, by "crushing" a polyp/calcite and eating it.
     
  16. sunburst

    sunburst Thread Starter

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    After my latest episode with a broken lense/uv filter i discovered this black crab feeding on the resulting algae growth. My attitude towards crabs in general has become a lot more accommodating, but i am still nervous that there maybe those that should be cautioned against. Is this one?
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  17. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Sean,i say yank that guy outa there
     
  18. Alan

    Alan Admin MASA Contributor

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    They make me nervous aswell Mekaeel.
     
  19. Obi-Wan

    Obi-Wan

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    Something setting off my spidey sense...

    WOAH!!

    How long have you had that piece of Acro??

    Alan, doesn't green basal areas of last acro pictures remind you of something ?

    LOOKS like the invasive, parasitic, fatal(to coral) Ostreobium algae spp.
    AKA Green Boring alga

    It's down right sneaky in it's onslaught

    "boring=unexciting", it AIN'T!!

    It's contagious in aquarium perspective.

    I hope I'm guilty of misdiagnosis.

    Any case, it's best to fragment into healthy tissue.
    THEN biopsy necrosed area.
    If in cross-section it's green, Ostreobium is confirmed as pathogen!

    Don't want you to incur losses, or incite your wrath ( Valhalla nogal!)

    Contact me if you'd like directions/further action options.

    Good Luck routing out all invaders.
     
  20. charlesr1958

    charlesr1958

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    I agree, the first photo is a Tetralia sp. , a harmless commensal. The second one is a member of the Xanthid family and is no way reef safe.

    Coral Crabs

    Hitch Hiking Crabs

    Chuck
     
  21. Mike

    Mike Retired Moderator

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    Great links, thanks Chuck
     
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