wodesorel wrote:Oh, a nekkie crab can travel. I've found my Es buried on the opposite side of the tank from their ditched shell. Don't let a uncovered bum fool 'ya - they're still wicked fast, but they're also extremely prone to fatal injury since a little bump or scrape can burst internal organs.
How small is small? If we're talking 19 crabs whose shells could fit on a Quarter you should be fine until they start growing. However, if they're bigger than that they'll start getting a little territorial and a little more adventurous when underground. It could be that your naked guy got chased out of a shell rather than ditched it. The more crabs you have in a small space the more likely they are to cause trouble with each other. They're colony animals, but they are completely opportunistic and they will attack their comrades to get a leg up in life. (For a shell, for a meal, etc.) It can definitely work to have a lot in what would be considered an undersized tank, but the risk goes sky high by doing so. And I'm speaking from personal experience with 60 large hermits in a 135 gallon. I do it, but I don't recommend it. It's too much of a constant worry. I also would only ever endorse doing so with Purple Pinchers - the other species cannot handle being crowded and will turn on each other. Even some PPs can't handle it.
With your situation I really do think it comes back to that judgement call. Risk the lives of 12 for the life of 1. Although the risk is tiny IF you iso them all immediately and keep them there until they are eating and drinking normally. Rushing them back to the company of others can get them attacked and killed. Even if they look okay when dug up they could be still at a weakened point of the molting process and become an easy meal for the others. I have moved many crabs over the years and never had one die, but it's a pain and it takes having a good sized molting iso to keep them separated - sometimes even from each other.
You and I are exactly alike! What you don't recommend is also what I like too and i put in the time to take care of them. Also have a empty 20 gallon on standby. Although I know many will oppose this, I just can't see having a 40 luxury gallon tank with only 4 crabs in it. It doesn't compute to me and they don't display enough energy to require that much space on a daily basis but I understand the applied dynamics. That's exactly what I mean? My crabs are small...most of them so a 40 gallon is not overcrowded...to me. It has plenty of space especially with 10 inches of substrate which provides a vast amount of spacing below. I actually answered these but don't know if people did not read the thread but the dirt is perfect, firm but moist like wet sand and the crab is not in the immediate area because the tunnel runs deep so you definitely understand it when you said the crab is likely not in the area. My question is if the tunnel collapsed and he was escaping from danger or an attack, why would the crab run back into the hole when the surface has plenty of space and there are plenty of shells available? Instinctively it does not add up or make sense in the animal word as they would get out of there and keep going even if they have to hide and I didn't get that impression. The crabs I have love it down there. I have crabs that dig into the dirt during the day, pop out for food and a jog (or walk), then disappear into another hole and this seemed to be something like that. The crab probably already has a shell since a majority of their activity takes place around 2 am...I just happened to catch it. I also caught what looked like 2 crabs making out or having sex. At first I thought it was an attack so I turned the lights on and saw a crab on its back and the other crab rubbing on its under section, no claws, no struggle and they kept at it even when I opened the tank. LOL Had to separate them.
Anyway, not trying to ruffle any feathers or be defensive but wanted to say clearly what happened and wanted to get candid opinions so thank you.
My goal is to have a hermit colony of 150 crabs in a 200 gallon tank with 16 inches of substrate then move those that grow big into another tank for spacing but my personal liking is to have a tank with perfect climatic conditions, lots of activity and lots of crabs, half up, half down or all up and all down. (-:
Mostly PPs but also a few E's, Violets, and maybe 1-2 Strawberries bit Strawberries definitely need their own space and a much hotter, saltier climate so may thing twice about that one. LOL