There seems to be some controversy and confusion regarding the need for UV-B lighting with hermit crabs. Due to the esoteric nature of our chosen pets, few studies are available to draw from which explicitly study hermit crabs. There is however a considerable volume of research regarding crustaceans, and more specifically decapod biology available to study.Read More →
Why are hermit crabs hairy? Those little ‘hairs’ you see all over the body and chelipeds of your hermit crab are not hairs at all. They are an extension of the exoskeleton and are called setae. A seta is an elongate projection with a more or less circular base and a continuous lumen; the lumen has a semicircular arrangement of sheath cells basally. [1] Revising the definition of the crustacean seta and setal classification systems based on examinations of the mouthpart setae of seven species of decapods A. GARM Zoological Journal of the Linnean Society, Volume 142, Issue 2, October 2004, Pages 233–252 What inRead More →
There may come a time when you find it necessary to euthanize your hermit crab to end it’s suffering. I’m providing the information that I found to be reliable. Please ensure that you are not confusing a surface molt with death. https://www.researchgate.net/post/What_is_the_least_drastic_method_to_kill_decapod_crustaceans_for_subsequent_preservation http://kb.rspca.org.au/What-is-the-most-humane-way-to-kill-crustaceans-for-human-consumption_625.htmlRead More →
A hermit crab’s gills are enclosed in the branchial chamber, which functions as a lung. The branchial chamber is on the sides of the thorax, above the crab’s legs. A hermit crab breathes through its gills and branchial chamber, which must be kept moist in order to function. If the branchial chamber and gills dry out, the crab will die. Compared to aquatic crabs, land hermit crab’s gills are reduced in size, and if the adults are kept underwater too long, they will drown. [2] There are tufts of setae at various sites on the ventral surface that enable moisture from the substrate to beRead More →
In hermit crabs, the fourth and particularly the fifth pereopods are reduced, usually remaining within the confines of the gastropod shell and hence are not used for walking. These appendages do however becoming important when the hermit crab attempts to right itself, providing anchorage within the shell. Further, the fifth pereopod has become specialised as a gill cleaning appendage, often resting within the gill chamber (Bauer 1981). On the abdomen only the left pleopods are retained (Poore 2004).[1] Hermit crabs used specialized setae on the third maixillipedes and fifth pereiopods for most grooming but used the unmodified first, second, and third pereiopods as well. MostRead More →
Gonpores are the openings of reproductive system to exterior. In male, pore on basal segment (coxa) of last (eighth) thoracopods; in female, pore on coxa of sixth thoracopods (third pereopods) [1] Coenobita rugosus has been found to be intersexual We are building image galleries of specific body parts. If you have high resolution, clear photos that you would like to donate to this project please contact us via email: crabstreetjournal at gmail dot com Overview of the anatomy of a land hermit crab (Coenobita) References: 1 Stachowitsch, 1992Read More →
The Cephalic shield [1] or carapace is part of the exoskeleton that covers the cephalothorax. It functions as a protective cover, hence the common name ‘shield‘. We are building image galleries of specific body parts. If you have high resolution, clear photos that you would like to donate to this project please contact us via email: crabstreetjournal at gmail dot com Overview of the anatomy of a land hermit crab (Coenobita) Photo credits: HUSO Chen Yu-Jung Stacy Griffith References: Dardanus megistos by Storm Martin 2012Read More →
Land hermit crabs have two pairs of antennae. The antennae are vital sensory organs that allow Coenobita to locate the ocean, their food and to explore their surroundings. Coenobita rely on humidity in the air to aid them in smelling and locating various odors. In Coenobita Violascens the antennal acicle is fused with second peduncular segment. To capture odors, crustaceans move their antennules back and forth through the water in a motion called flicking. We are building image galleries of specific body parts. If you have high resolution, clear photos that you would like to donate to this project please contact us via email: crabstreetjournalRead More →
Chela (organ) A chela /kˈiːlə/, also named claw, nipper or pincer, is a pincer-like organ terminating certain limbs of some arthropods.[1] The name comes from Greek (χηλή) through New Latin (chela). The plural form is chelae.[2] Legs bearing a chela are called chelipeds.[3] Another name is claw because most chelae are curved and have a sharp point like a claw. Also called pincer or pincher. We are building image galleries of specific body parts. If you have high resolution, clear photos that you would like to donate to this project please contact us via email: crabstreetjournal at gmail dot com Overview of the anatomy ofRead More →
Coenobita possess compound eyes comprised of faceted lenses which are especially adept at picking up fine movements. The eyes are located on movable stalks and this is one of the primary ways we determine the species of hermit crab we are looking at. We are building image galleries of specific body parts. If you have high resolution, clear photos that you would like to donate to this project please contact us via email: crabstreetjournal at gmail dot com Overview of the anatomy of a land hermit crab (Coenobita) Photo Credits: The Crab Street Journal has been granted permission by these photographers to useRead More →