Temperature & Humidity Guidelines-should they be higher? When the 70-80 guidelines were established, it seems that the majority of crabs available were Clypeatus. With the increase in "exotic" species, perhaps we should re-evaluate those guidelines. I have been doing a bit of searching around the internet and have found some interesting reading with regard to the natural climates from which our crabs hail. Many of the "exotics" (Brevimanus, Cavipes, Compressus, Perlatus, & Rugosus) are from regions very near to the equator. Many (except the compressus) are found on the Seychelles Islands (Vanessa's Site). I found a site that has compiled information about the Average Air Temp, Max & Min Air Temps, Sea Surface Temps, Daylight Hours, Cloud Cover and Humidity for these islands. The statistics are based on data collected over a 30 year period of time at Seychelles International Airport. http://www.pps.gov.sc/meteo/monthly%20climate.htm I plugged all of the numbers into a spreadsheet to arrive at the Average Yearly Figures for each of the categories. I think it is rather interesting to note that the temps seem to be much higher than what is commonly indicated for care of the land hermit crab. Air Temp...................................80.558 Air Temp Max.............................85.791 Air Temp Min..............................76.225 Sea Surface...............................81.983 Daylight Hours..............................6.925 % Cloud Cover............................63.416 % Humidity.................................80.083 Perhaps the lower end of the recommended spectrum (70 degrees) is fine for the Caribbean Crabs found along the coast of Florida to the Caribbean Islands, but may need to be a bit higher for the species native to areas near the equator. While I realize that not all of our crabs come from these islands, it stands to reason that the temps they are accustom to along the equator must be higher. This may account for some of the "inactivity" that crabbers report among their Cavipes and Brevimanus. I don't think that 70 degrees is detrimental to these species since many crabbers seem to indicate that their crabs are fine at this temp. But there is a big difference between surviving and thriving. I have observed all of my crabs with the exception of the Clypeatus, huddled into the corner of the tank (which is kept at 75 degrees) where the incandescent moon glo bulb is positioned shining on the outside of the tank. They have been doing this since I placed it on the tank. They even hang out of their shells as if they are trying to increase the surface area that is exposed to the heat in an effort to absorb as much as they possibly can. There are several different temperature zones in my tank and the perlatus, ecuadorians, and rugosus all seem to prefer that corner. My Brevimanus are both buried at the present time, so I can't offer any observances on them. In addition to the cozy spot in the corner, I have also observed many of the same 3 species as close as possible to the 40w Repti-Sun 2.0 fluorescent light (75 gallon tank) as they can possibly get. Many times they are in the ballast of the light fixture itself with their shells in direct contact with the light. Since it is a fluorescent light, it does not give off much heat so I would think there is no worry that they are in danger from overheating by having direct contact with it. I am still in the process of researching the areas that are native to the crabs in the wild and if anyone has any sites they can point me to, I would be very grateful for the information. This post is simply meant to plant the seed of curiosity. It is your job to cultivate it ***update*** I have recently purchased a new fixture that accomodates the use of fluorescent and incandescent bulbs together. The temp in my tank has been around 77-79 (humidity around 78%) for the past two weeks and there has been a marked increase in the amount of activity in my tank. I still see many of the crabs up as high as they can get on the cork bark-closest to the heat source, but they don't stay parked there for long periods of time. I have taken precautions to prevent them from getting near the incandescent bulbs. I also want to add that the tank is set up in such a manner that plenty of shaded areas are provided should the crabs choose to take shelter from the light.