Goby Dick Posted September 18, 2006 Share Posted September 18, 2006 Hi, first , on the glass there's around 5 of these... or at least there was till I cleaned it! Second, on my LR. Around 5-6mm tall. Hydroids? Any action required in either case? Thanks, Ade. Link to comment
nUgZ Posted September 18, 2006 Share Posted September 18, 2006 Both are hydroids. Removal of the ones on the glass would be tough. Try and get rid of the ones on the rock if you can. You could use tweezers. Some people have also said to use superglue gel over top of them. Link to comment
Goby Dick Posted September 18, 2006 Author Share Posted September 18, 2006 Are all hydroids bad / invasive / a PITA then? I was just reading a diving page that claimed that on a real reef pretty much any 'bare' surface that doesn't have corals is covered in hydroids. I just noticed the same type in a pretty inaccessible back-of-a-rock sort of place... eradication would be more than a challenge. Ade. Link to comment
nUgZ Posted September 18, 2006 Share Posted September 18, 2006 If they are out of the way and not actually touching one of your corals then it's not as bad. They could still spread from that spot, but those not touching anything don't directly do any harm. Link to comment
DementedLullaby Posted September 18, 2006 Share Posted September 18, 2006 Hydroids to me were part of the tanks cycle. I had a lot at one point but they've died off to near undetectable levels. I notice more and more dissapear daily. Link to comment
Angel Posted September 19, 2006 Share Posted September 19, 2006 You can find out more about them here: http://www.ronshimek.com/Animal%20Groups%2...0Cnidarians.htm Link to comment
proraptor2 Posted September 19, 2006 Share Posted September 19, 2006 I have hydroids And have never had a problem....I dont have any corals touching them though either... Link to comment
Goby Dick Posted October 7, 2006 Author Share Posted October 7, 2006 Angel: Thanks for the link... so I have crawling jellyfish! The other hydroids have gone; eaten or died (or both...) but then they were a sitting target. DementedLullaby: Your cycle theory seems to fit because as one lot go... The next colony of what I think are another hydroid species to turn up are truly hitchhikers... These are 'proper' little polyps. All my snails have them and don't seem bothered. Ade. Link to comment
formerly icyuodd/icyoud2 Posted October 8, 2006 Share Posted October 8, 2006 those "crawling jellyfish" actually swim. (the ones on the glass) if you look real close at the surface of the water, you might be lucky enough to see one. they swim just like a jellyfish. Link to comment
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