Edit:
What are your current water parameters (Temperature, Salinity, pH, Ammonia, Nitrites, Nitrates)? Maybe one of these is out of whack. They prefer cooler temperatures and a large open bed of deep fine sand. I’ve read that they also need a lot of worms in their diet, as well as clams. Check out the second link below for more info.
Just a suggestion beyond checking the water parameters - are you sure what you’re seeing is the crab? These molt their exoskeleton, just as do insects, shrimp, and crabs, so what you’re seeing may be the castoff of the old exoskeleton and your crab is hiding in the substrate/rocks until the new one hardens.
Or your crab about to molt, and just finding a place to settle down while this happens.
Make sure the crab is getting enough food - when I tried keeping them, I would always put a few sinking pellets directly in front of their shell so they could quickly cover it so the food wouldn’t be "stolen" by the fish or shrimp in the tank.
that is funny. I didn’t think people kept horse shoe crabs.
He is probably dead.
Go get a new one.
Is it in a saltwater tank?
Edit:
What are your current water parameters (Temperature, Salinity, pH, Ammonia, Nitrites, Nitrates)? Maybe one of these is out of whack. They prefer cooler temperatures and a large open bed of deep fine sand. I’ve read that they also need a lot of worms in their diet, as well as clams. Check out the second link below for more info.
Regards
Just a suggestion beyond checking the water parameters - are you sure what you’re seeing is the crab? These molt their exoskeleton, just as do insects, shrimp, and crabs, so what you’re seeing may be the castoff of the old exoskeleton and your crab is hiding in the substrate/rocks until the new one hardens.
Or your crab about to molt, and just finding a place to settle down while this happens.
Make sure the crab is getting enough food - when I tried keeping them, I would always put a few sinking pellets directly in front of their shell so they could quickly cover it so the food wouldn’t be "stolen" by the fish or shrimp in the tank.
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