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Defense mechanism: "Calappa, when seized, often draws up its legs under the broad shields formed by the overlapping edges of the carapace, thus seeming to sham death. No doubt it is more difficult to dismember in this attitude, but it is quite possible that the action has no such special significance in this case, being instinctively adopted whenever the animal is moved against its will. The colouring of many Calappidae is another feature in which they are adapted to their environment, being sand-like, and clearly protective."
Calappa are usually more active than other sand crabs. (Borradaile, 1903)
"Dredged in Felidu, Haddumati and Suvadiva Atolls in 25 — 43 fathoms." (Borradaile, 1903)
Inhabit sandy areas. (Borradaile, 1903)
Respiration: From their concealment in the sand, they create breathing channels to the surface of the sand. "The Calappidae draw in water, like many other crabs, down a passage formed, so to speak, by 'holding the hands against the breast,' and so into the gill-chamber through an opening in front of the chelipeds, guarded by the wide base of the epipodites of the third pair of maxillipeds. But their hands (chelae) are peculiarly shaped for this purpose, being very broad and flat, and usually having a toothed crest, which is held against the forepart of the body. Through the notches between the teeth water can enter, while at least the coarser sand-grains are kept out." (Borradaile, 1903)
Basic mode of nutrient uptake is heterotrophy.
"Judging from the contents of their stomachs, de Haan came to the conclusion that Calappa... feed on other crabs." (Borradaile, 1903)
Calappa gallus, common name rough box crab,[1] or lumpy box crab,[2] and Hawaiian name poki poki,[2] is a benthic species of box crab in the family Calappidae.[1]
Calappa gallus, common name rough box crab, or lumpy box crab, and Hawaiian name poki poki, is a benthic species of box crab in the family Calappidae.
Calappa gallus (Herbst, 1803) è un crostaceo decapode appartenente alla famiglia Calappidae[1].
È diffusa in tutti gli oceani[2]. È comune soprattutto in Mozambico, Polinesia Francese, Seychelles, Nuova Caledonia e Riunione[1]. Vive fino a 15 m di profondità in zone con fondali sabbiosi[3].
Il carapace è lungo circa 7 cm, giallastro; la sua superficie è irregolare e rugosa[3]. Sulle chele e sul carapace possono essere presenti macchie rossastre[3].
Calappa gallus (Herbst, 1803) è un crostaceo decapode appartenente alla famiglia Calappidae.
Calappa gallus is een krabbensoort uit de familie van de Calappidae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1803 door Herbst.
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公鸡馒头蟹（学名：Calappa gallus）为馒头蟹科馒头蟹属的动物。分布于日本、百慕大、巴西、菲律宾、印度尼西亚、斯里兰卡、丹老群岛、印度、波斯湾、红海、东非及西非大西洋沿岸、台湾岛以及中国大陆的西沙群岛、海南岛等地，生活环境为海水，一般生活于珊瑚礁中或泥沙质的浅海底。[1]
这是一篇螃蟹小作品。你可以通过编辑或修订扩充其内容。 公鸡馒头蟹（学名：Calappa gallus）为馒头蟹科馒头蟹属的动物。分布于日本、百慕大、巴西、菲律宾、印度尼西亚、斯里兰卡、丹老群岛、印度、波斯湾、红海、东非及西非大西洋沿岸、台湾岛以及中国大陆的西沙群岛、海南岛等地，生活环境为海水，一般生活于珊瑚礁中或泥沙质的浅海底。
