Zooxanthellae

Discussion in 'Coral' started by Va Reef, Jan 30, 2011.

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  1. Va Reef

    Va Reef Giant Squid

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    Is Zooxanthellae the stuff that makes certain corals (palys for example) glow green under actinics? once they expel it, can they gain it back? because i think my palys lost all of theirs after salinity sky rocketed. this morning i noticed that green glow. i thought this was immposible? will they go all the way back to that bright green?
     
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  3. inwall75

    inwall75 Giant Squid

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    They rarely lose all of their zooxanthellae. Even if they did, they can be re-infected by the same zoox or sometimes a different clade of zoox.
     
  4. Va Reef

    Va Reef Giant Squid

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    how would they be reinfected? its the only coral i have in my tank? and does the Zoo. also affect the overall color of the coral? because at the lfs it was brown, but in my tank is pinkish.
     
  5. 2in10

    2in10 Super Moderator Staff Member

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    It was brown at the LFS because of stress, it is assuming it's natural color in your tank. Re-infection occurs because the coral will absorb the zoox or attempt to eat and then incorporate it into its system.
     
  6. Va Reef

    Va Reef Giant Squid

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    so even if it lost alot of zoo. about 2 weeks ago, it can still gain it back? gosh i love the little suprises:cheesy:. thats a relief though, cuz i loved that green look. thanks
     
  7. missionsix

    missionsix Super Moderator Staff Member

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    Fluorescent proteins are responsible for the "glow" you get under actinic lighting.
    In the case of green star polyps, you have green fluorescent proteins, or GFP's.
    Fluorescent proteins - Scholarpedia
     
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  9. inwall75

    inwall75 Giant Squid

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    Corals regulate the amount of zoox they have based on many factors. Primarily it's based on Oxygen levels. However, it can be based on nutrient levels, temperature levels, salinity levels and so on. When the coral is first infected, the zooxanthellae (which is a dinoflagellate) lose their flagella. In other words, they lose the ability to swim. If a coral spits it out, it is subject to the flow in your tank. If it gets unlucky, it might end up in your skimmer. If it's lucky, it avoids filtration long enough to either bump back into a coral polyp or regrow it's flagella. In your case, since you only have one coral, it can't be reinfected by a different clade. However, if you had other corals in your tank, this is a definite possibility.

    Zoox does have an impact on coloration on corals. Particularly on SPS corals where the tissue is only 1 cell thick. However, most of the coral coloration comes from Peridin, Highly Flourescent Pocilliporans, Chloraphyll, etc (probably spelled wrong). To understand this I would recommend this. Google Dana Riddle coral coloration
     
  10. Corailline

    Corailline Super Moderator Staff Member

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    It is a dry heat, yeah right !

    Excellent post!!!!
     
  11. inwall75

    inwall75 Giant Squid

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    Thanks Corailline. I will try and remember to come back to this thread and explain better. Preparation for the contest is priority right now.
     
  12. Corailline

    Corailline Super Moderator Staff Member

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    It is a dry heat, yeah right !
    When you do can you touch on UV protection and the part in plays in coloration as well?

    TIA