HOLY COW! The one I accidently got from Flower is only about an inch long? Should I expect the same growth from mine? How long do they live and do I need two to reproduce? If I do need two......... Flowweerr.....
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LOL...They are the good guys, and a very needed part of the CUC. The eaters of the dead prevent you having to clear your tanks rock to find a missing critter before it pollutes the tank. All tanks that have live rock have at least 1 bristle worm in it, they will reproduce as the food source allows them to. There are critters that eat them, if there are too many as a result of having too much of a food source. Like all living sea critters, the longer it lives, the bigger it grows...but most of these sea critters have a short life span.
Could you imagine how much ammonia would be created with so much food rotting that the fish miss and don't eat, deep in the rock work? Your bristle worms keep your tiny ecosystem from crashing. I see people go from over feeding their fish to starving them for days to prevent pollution. Snails clean off algae, but we need the meat eaters (some snails are) too. A good balance of algae and meat eaters will make a good CUC and a happy tank.
People like myself with seahorses need to be concerned because seahorses hitch to everything, and could be stung, I have already lost 1 from that. They don't bother healthy fish or corals....they eat the dead or dying.
Well any time you want to get rid of any to protect your seahorses let me know. Maybe when I help you with your next water change. Lol