我们最喜欢的无脊椎动物是将礁石介绍给我们的“清理船员”的一部分，是我们最喜欢的无脊椎动物。其中包括温和的燕尾服顽童Mespilia globulus, is one of the best since it grazes all manner of undesirable algaes, and don’t tend to knock corals and frags over, the way that large snails and hermit crabs do.
虽然它们可能在温柔的一面，但燕尾服顽童loveto pick up and collect random loose bits around the aquarium, especially loose shrooms, zoanthid polyps and pretty much anything they fancy. We’ve had a particular specimen of tuxedo urchin that has carried a loose piece of green star polyps that we’ve enjoyed through various tanks for over three years, but finally found a compelling reason to break up this friendship.
我们应该解决绿星息肉在近三年的旅程中没有超越燕尾服的运输方式。一旦我们将其从顽童中摘下来，似乎鼓励绿色星息垫“向内”生长。我们真的不知道顽童是否以某种方式管理了恒星息肉的发展，无论是故意的还是偶然的，但是至少可以说，底面的增长是特殊的。
But this growth confinement was not a permanent solution because in time the GSP ‘hat’ did reach the outer edges of the urchin, and therein lied the problem. Once the tentacles of the polyps reached more widely around the urchin, it then became able to sting any corals that the urchin happened to be grazing close to.
After a few corals showed a mysterious, localized tissue recession, we eventually noticed that these were confined to preferred pathways of the GSP-covered urchin, and even caught the problem in the act. It was a long, fun ride to have a GSP-covered tuxedo urchin for so long, but now that the potential danger has become clear, we’ll be more diligent about not leaving loose corals and polyps in tanks where urchins are kept.
