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What animal is this?

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nanome

Member
Joined
Oct 5, 2004
Messages
17
Location
TEXAS
Hi all,

I have seen these critters on my live rock, and now they are all over my new orange sponge. They are of various sizes, ranging from smaller a rice to nearly 3/8 inch long. Each critter has 6 side legs near its rear, allowing it to turn around 360 degree at the same spot (see pics.) At first I thought they are copepods, but they seem too big to be copepods (i really don't know how big copepods suppose to get). (There are a bunch of other very small critters, about the size of a grain of sand. I assume they are children of the bigger ones.)

Are these critters dangerous. I cannot yet tell whether the orange sponge is being eating up, but these critters craw everywhere on that sponge. If they are dangerous, how can i remove them? Would mandarin gobie eat them. As said, some of these are rather big (3/8 inch).

Thanks
 

Oscapus

Well-known member
Joined
Dec 25, 2003
Messages
118
Location
Salt Lake City, Utah
Yes, great job with the photos. If my seahorses saw those they would break into a gallop. Amphipods illicit an amazing feeding response from my seahorses, Anthias, and others. I find them all the time while changing my filter sock. That is how I get off my lazy duff and clean the tank, by looking forward to the frenzy afterwards!
 
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