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Are these hydroids?

JMW

By JMW,
in New to the Marine Aquaria Hobby

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JMW

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Hi guys,

need some help. Saw these on LR, they fluoresce rather coolly under actinics, becoming a glowing yellow/green. But my camera cannot capture. Are hydroids known to glow under actinics?

When touched, they retract into their tube & become a glowing dot 

Under normal lights, this is how they look like... are they really the dreaded hydroids?

 

hydroids.jpg

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