Txawm hais tias muaj ntau yam ntawm cov roob ris, lawv cov kev sib txawv me me thiab xim, nws yuav tsum nco ntsoov tias txhua tus crabs muaj tib lub cev qauv. Yog li kos tawm nws ua ntej, ua raws cov cai yooj yim, thiab tom qab ntawd ntxiv cov yam ntxwv ib tus.
Cov Lus Qhia
Kauj ruam 1
Pib kos duab lub crab ntawm nws lub npog tas ib ce. Nws yog nrog lub plhaub muaj zog, uas yuav luag puag ncig. Thov nco ntsoov tias hauv qee cov tib neeg nws yog me ntsis beveled ntawm ob sab, tab sis tseem zoo ib yam txog lub cev axis. Cim nrog rau qhov pom kev nrawm nyob qhov twg koj tom qab yuav tsum tau nthuav qhia txog lub nraub qaum nrog xim. Kuj tseem kos cov pos ntawm ob sab ntawm carapace nrog tus cwj mem.
Kauj ruam 2
Thaum cov kos duab ntawm lub crab lub cev npaj txhij lawm, kos duab ntawm ob txhais ceg ntawm tus tais diav. Cov plaub nraub qaum yog qhov sib txawv ntawm cov tib neeg thiab tuab, nws txhua tus nyob ntawm hom ntawm ib tug neeg. Txhua ceg ntawm lub crab muaj plaub ntu. Kos cov spikes ntawm qhov kawg ntawm tus thib ob, thib peb, thiab plaub khub ntawm ceg. Lub ntsej muag hind xaus nyob rau hauv ib tug racquet-zoo li hniav sib koom tes. Hauv qee qhov arthropods, taug kev ob txhais ceg yog them nrog cov plaub mos mos. Kos pincers rau ntawm txhais ceg pem hauv ntej, lawv zoo li cov hlau txiav, nrog ib tug tuav me dua lwm tus. Feem ntau cov roob ris muaj cov txoj cai loj dua sab laug.
Kauj ruam 3
Tom qab tus pas nrig muaj lub plhaub thiab txhais ceg, koj yuav tsum kos lub taub hau. Nws, zoo li nws lub cev, muaj ntu. Kos rau ntawm lub taub hau ob khub ntawm me me kav hlau txais xov thiab lub qhov muag, lawv zoo li periscopes tau tsa siab.
Kauj ruam 4
Tam sim no pib tha xim duab. Nco ntsoov tias cov xim ntawm lub plhaub, claws thiab nqua yog nyob ntawm ntau tus neeg qhov chaw nyob. Yog li no, yog tias koj tab tom pleev ib daim roob ris nyob hauv algae, siv cov duab ntsuab thiab txiv ntseej. Yog tias koj tab tom teeb duab coral reef dweller, koj yuav tsum tau kos nws lub plhaub variegated nrog tus qauv. Taw qhia txog qhov loj rau sab nraum qab ntawm lub roob ris, kos cov pos ntawm lub khauj khaum thiab claws. Nrog kev pab ntawm txhuam, xav tau nyob rau hauv daim duab tias cov kaus hniav tau npog nrog ntau qhov tawv me me, thiab cov khub khub ntawm cov ceg tawv tau npog nrog cov plaub mos mos. Cov khoom siv tawv tawv thiab yooj yim uas npog lub roob ris ntuag yog qhov txawv ntawm lub chitin ntawm lub plhaub, yog li siv cov duab sib txawv los cuam tshuam cov nta no.
