Can I just go on a little rant about hermit crabs here? Because I rescued one the other day and, sadly, Iām not sure if itās even going to survive itās molt. The way people treat these poor things drives me up the walls.
If you go to any touristy beach spot in the US during the summer months, chances are that along with shitty fridge magnets and T-shirts, every gift shop you walk into is also going to have a cage full of hermit crabs for sale.Ā
You can typically buy a āhermit crab kitā of couple animals, a cage, bottle of nutritionally-lacking hermit crab food and some tackily-painted shells for $30 or less. Hermit crabs are sold as cheap, short-term, low-maintenance pets that will probably be dead by the time your kid gets tired of them anyway. This is what a typical hermit crab cage looks like:
The one I rescued just spent the last four months of his life in here, along with two of his friends, who are now dead as a result.
And this is what a hermit crab enclosure is supposed to look like:
You may notice some differences here. Letās start breaking them down.Ā
The first cage is too small for one hermit crab, let alone three, and it has nothing for them to climb or explore.Ā
There is only a single dish for water. Hermit crabs need both fresh and salt water to survive for long periods of time.Ā
There was no de-chlorinator sold with this hermit crab starter kit. Hermit crabs are very susceptible to chemicals in their water supply.
There is no heat lamp.Ā Purple pinchers (C. clypeatus) need to be kept between 70-85Ā F to be happy. If they arenāt, your hermit crabs will become lethargic, stop eating, and die.Ā
The walls of the cage are made out of wire mesh. That means that the animal is going to dry out.Ā The little humidity sponge thatās sold with the cage doesnāt help. Hermit crabs have gills. If the air they breathe has less than 70% humidity, theyāre in trouble. If theyāre unprotected, in a building with forced heat, they will suffocate in the dry air and die.Ā This is why so many of them die when winter rolls around, and a huge part of why theyāre sold with such a low life expectancy.
There is nowhere for a hermit crab to bury itself. This means the animal cannot molt properly. Purple pincher hermit crabs (the kind I have) molt every 6-18 months, depending on their age, for several weeks at a time. They need to bury themselves in substrate (sand and dirt) to do this. If they canāt, they turn pale, curl up, and become completely non-responsive as they hibernate. Even for experienced hermit crab enthusiasts, this looks a lot like being dead.Ā
Hibernation can also be induced by stressā for example, oh, any of the factors listed above! When this happens, most hermit crab owners willĀ assume that their pet is dead and THROW IT AWAY.
Please, please, do not do this to your pet! Itās still alive!! The man I rescued my hermit crab from the other day had three animals in the cage when it was given to him as a gift this summer. Despite the fact that he thought he was doing everything right, the other two ādied of natural causes.ā And so he just threw the bodies away. They might have survived for years if he hadnāt done that. And, his mother-in-law, who also got herself a cage of hermies, apparently did the same thing to all three of hers. :(
This is why hermit crabs are sold as short term pets. Not because they have short lifespans, but because hermit crab buyers arenāt given adequate information or supplies to care for their pet properly, and the people who sell them know that tourists who buy them are just going to neglect their animals and then kill them.
You may notice that I keep bringing up the āshort-term petā thing. You might also notice I seem kind of angry about this. Why all the rage? Because the average purple pincher can liveĀ UP TO TWENTY YEARS IN CAPTIVITY.Ā Some other species can live for THIRTY.
Hermit crabs are NOTĀ a short term commitment!!Ā If you take care of them properly, these guys will STILL be in your life after youāve graduated from college, gotten married, had kids, gotten old and fat, moved across the country a couple times, and possibly even after your human children have moved out and left you and your crab to be hermits together. TWENTY YEARS. Itās a pretty respectable lifespan for an arthropod.Ā
Itās not an impossible commitment though. Hermit crabs are easy enough to take care of, and they donāt make noise or messes. Hermies are funny, and cute, and more social than people realize. Despite the name, purple pinchers hardly ever pinch. What they do do is follow each other around the terrarium, bonk off the walls like misguided tiny tanks, and fall over each other a lot.Ā
Theyāre shy by nature, but they can be comfortable with people if theyāre socialized. I babysat one for six months who used to cuddle up in my scarf and climb my sleeves. It was adorable. Hermit crabs are climbers, and if you let them out of their cage theyāll scale the sides of your couch like itās mount Everest, and try to join in your movie night by eating a single piece of popcorn.Ā Hermit crabs are great pets.
Which, actually, brings me to my next point⦠Now that Iāve just spent all this time telling you how how great hermies are, and how to take care of them properly, Iām going to do a complete 180 and ask you toĀ please not buy a hermit crab in the first place. Hermit crabs in captivity canāt reproduce. The first part of a hermit crabās lifecycle is spent floating in the tropical waters of the Bahama islands as a kind of planktonic larva (the technical term is zoeae, and yes, I haveĀ recently used that in a game of Scrabble). That stage of the development canāt be reproduced in a fishtank. That means that all of the thousands of hermit crabs for sale in the United States every year are captured from the wild. Generally speaking, you shouldnāt ever buy an animal thatās been taken from the wild anyway. But for an species that breeds only once a year, and is susceptible to basically every pesticide ever invented⦠well. There are whole islands where purple pinchers used to be found in the hundreds of thousands, and are now totally gone. :(
These poor babies need a lot of help. If you want to have a hermit crab of your very own, please consider rescuing oneā there are so many out there in unsafe homes. There are also organizations online that help rescue and re-home crabs. And if you already own one, please research how to take care of him properly. It might be more work than you planned on, but I promise it is worth it!