ʻAʻole nui ka nui o nā mea kanu ʻōpala e ʻike i ka hiki ʻana i ka ʻōpala me ka ʻike ʻole ʻia. ʻO ka Shedding ka kiʻui o ka uhi chitinous kahiko o ka crayfish (shell) i hiki iā ia ke ulu. ʻO ka maʻa mau, ua hoʻoheniʻi nā ʻōpiopio maʻa mau ʻia i hoʻokahi makahiki (ʻo ka ulu ʻōpio a ʻoi aku ka wā ʻōpio) a ma hope o ka hoʻokuʻu ʻana o ka mea kahiko, hoʻomaka hou kahi ulu. No laila, pono ka mālama pono ʻana o ka ʻili i loko o ka aquarium. Inā ʻike ʻoe i ka maʻi hoʻomaka ʻana e hūnā pinepine, a laila ʻaʻole hoʻohālikelike, ʻoiai paha, ua hoʻomaka ʻia e hoʻoheheʻe. A i ʻole ʻoe e ʻike aia i kāna pūloi i ka aquarium, ʻaʻohe mea pono ʻole e hoʻoneʻe ia mea! E ʻai ke kanesa, loaʻa iā ia ka calcium ma loko, e kōkua ana i ka hoʻihoʻi hou o ka mea hou. ʻO ka molting ka lōʻihi i mau lā, a me ka ʻai ʻana i ka uhi chitinous e hoʻolōʻihi i kēia kaʻina.

Nā kuʻuna o ka wai no ka mālama ʻana i ka crayfish i loko o kahi aku

ʻAʻole kūpono nā ʻano ʻano crayfish no ka wai wai waʻawaʻu, no laila, ʻaʻole e hoʻomaʻamaʻa. Mamuli o nā ʻano, ʻokoʻa ka pālahalaha o nā ʻikepili, mai 4 a 30 mau degere, akā ʻo ka pinepine kaʻai ʻana ma nā aquariums i mālama ʻia i kahi mahana o 22-26 tikelī.

Pono ka wai maʻi ma ka pūpū i ka mahana o ka lumi. Eia naʻe, ʻaʻole eʻoluʻolu nā mea āpau i nā kūlana.

No ka mālamaʻana i kekahi mau ʻano crayfish, pono nā pono hana no ka hoʻomoʻo ʻana i ka wai. No ka hoʻohālikelike, ʻaʻole pono nā kūleʻa pālahalaha ākea i nā minamina ma luna o 20 mau kiʻekiʻe. Hiki ke hoʻomehana ʻia ka hoʻohana ʻana i kahi friji a me ka pahu hau aku no nā kaola aku.

ʻO ka hoʻololi aku hale hoʻololi aku

Hoʻopau pinepine ʻia ka Crayfish i nā mea kanu palupalu, no laila ua hoʻokaʻawale ʻia kahi lāʻau hoʻonaʻau me nā mea kanu lāʻau me nā lāʻau paʻakikī.

E hoʻopiha ʻia ka aquarium i nā pua pua, nā mea kanu, nā pōhaku, nā ʻeke a hoʻolako ʻia me nā wahi no nā pā.

Pono nā noho ʻana, no ka mea, ʻaʻole nā ​​māka manu i nā mea hoʻouluulu ʻia, a hiki iā lākou ke hoouka i ko lākou poʻe nāwaliwali nāwaliwali, ʻoi loa nā mea i molle wale nō. No laila, pono nā mākaʻu no ka grottoes, driftwood, ʻōpala pua, nā pōhaku.

Inā ʻoe e hana i kahi pākana maʻamau, a laila nui ka iʻa a ʻaʻole kūʻē, akā hiki ke mālama pono iā lākou iho. Hiki ke mālama ʻia nā Stingrays, tetraodons a me aravan me nā mahi kalaka, no ka mea ʻokoʻa kēia mau iʻa i kā lākou ʻai me ka crayfish. ʻAʻole kūpono nā ʻōmaʻomaʻo lalo o ka lime i ka wā i kēia manawa, e hoʻouka ka palu i ka iʻa. ʻAʻole i hele mau ʻia nā ʻoiʻuki a me nā mea lawaiʻa i loko o ka ipu like.

Noho ka loko i loko o kahi pili kaiʻai e paʻa paʻa ana. E ʻoluʻolu e hiki i ka maʻi maʻi ke kuʻi i ka pale a i ʻole ka ipu, i waho mai ka hale aku, a hele no ka hele wāwae. ʻO ka hapa pinepine, holo nā crayfish i ka maikaʻi wai a maikaʻi ʻole ko ka oxygen. E hōʻiliʻili ka maʻi pakele ma kahi wahi nalo i kahi e make malū ai ia.

ʻO ka lawe ʻana

Pōmaʻomaʻo Crayfish i ka ʻai i nā kahe koko, nā mea paahana, nā ʻōpū honua, nā kīʻaha iʻa momona haʻahaʻa, nā ʻiʻo haʻahaʻa a me nā ʻōpū. Ke hānai nei i nā maʻi me nā snails, pono ʻoe e ʻike pono ʻole i nā hāʻawi ʻia nā loko a me nā maʻi ʻōlima ʻē aʻe, no ka mea e ʻae lākou i nā maʻi like ʻole.

ʻO nā meaʻai kanu, kūpono nā mea kanu pono no nā mea kanu ʻalaʻī e like me ka elodea a me ka duckweed. Hāʻawi ʻia iā lākou i ka paʻu palaoa, holoi holoi ʻia a me nā mea kanu lau no ka lawaiʻa. ʻAʻole hōʻole i ka Crayfish i ka palau ʻana i nā pakanani o nā mea i hui pū ʻia.

ʻO ka maʻi kanesa

ʻO kēia aloha nā mea kanu ʻaʻai ʻole aloha. ʻO ka ʻāina nui o ka iʻa holookoa palaka ma waena a me ʻEulopa ʻEulopa. Noho kaʻu palaka ʻia i loko o nā loko a me nā muliwai me ka lepo paʻakikī.

Pono ka crayfish i ka hoʻoheheʻe wai, no laila, i loko o ko lākou mau wahi, nā loko e pono ai nā wahi ʻoluʻolu.

ʻO ke lōʻihi o ka lōʻihi o nā kāne i hiki i 15 mau kenimika, a ʻo ka lōʻihi ka nui o 350 mau kekā, ʻo ka lōʻihi o ke kino wahine ka mea like me 12 a 15 paha kenimika, ʻOi aku ka nunui o nā 'ʻā'ī a me nā puʻupuʻu nui. ʻO ka umauma nui loa o ka pāho umauma ākea he 15-20 mau makahiki.

Pono ka wai no ka mālamaʻana i kēia ʻano, me ka pH kūaloko ʻole, paʻakikī paʻakikī. ʻAʻole hāʻule ka pae o ka oxygen ma lalo o 3-4 mg / l. He ʻino ke kiʻekiʻe o 24 mau mole no lākou, ʻo ka wela māla loa ka 18-20 degere. Mālama ʻia nā palekaleka ākea i nā koina mai 100 l, me kahi kānana o ke ʻano kiʻekiʻe, ʻoi a me ka nui o nā hale. Puberty i ka makahiki 3. I hoʻokahi mahina ma hope o ka moe ʻana, lawe mai hoʻokahi wahine i nā hua 200. Akā i loko o nā aquariums ʻaʻole lākou ʻano.

Kahai-pupulu

ʻO kēia ʻano o ka palaka ʻoi aku ka thermophilic. Noho ka pilimū manuahi mūloko i loko o nā kīʻaha o Caspian, ʻ Blackleʻele, a me ke Kai o Azov, he mea ʻē aʻe, noho lākou i nā wai wai o Western Siberia. ʻO nā wai e kahe ana a kū a kū hoʻi e kūpono i ke ola, a hiki no iā lākou ke noho pū ma ka wai aniani.

ʻAʻole kēia mau crayfish i nā lua, akā e loaʻa ka pale i waena o nā mea kanu a me nā pōhaku. ʻO ke ana o ka ea maemono maikaʻi loa he 22-25 kiʻekiʻe, a ʻo ka nui loa he 32 degere. Noho lākou i ka wai waikawa kūpono, pH 4.6-4.7.

Nā mea hoʻoneʻe ʻia ʻo nā kumuʻai kaola a puni ka ʻeke, no laila he mea maikaʻi loa ia e nānā iā lākou ma nā mea kanu. I loko o nā mea kanu, ʻaʻole ʻano like kēia ʻano, e like me ka mea ma mua.

Pula cuban cancer

ʻO kēia mau holoholona ka mea mua i lawe mai ka tropics a i nā aquarists Lūkini. ʻO ka lōʻihi o ke kino me ka ʻole o nā ʻōpū i loko o kahi ulana pōkole Cuban i hōʻea i 12 kenimika. ʻOiai ʻo ka inoa he “uliuli”, ʻaʻole like ia kēia kala, a hiki ke ʻokoʻa ke kala o nā kēla Cuban, ua hilinaʻi wale ʻia kēlā me ke kala o nā mākua, ke ʻano o nā paʻa a me ka meaʻai.

No nā lā kanu Cuban, he aquarium o 50 lita kūpono. Pono ke kānana a me ka hoʻopiʻi ʻana i ka wai, pono ke kau ʻia ke kauwela 20-27 kiʻekiʻe. Hoʻohana pinepine ʻia kēia mau iʻa me ka iʻa nui.

Kanu ka māla Cuba ma 7-12 mahina. Inā loaʻa kekahi o nā kāne like ʻole o ka wahine i loko o ka hale aku, a laila hele mau ka wahine me ka caviar. ʻEleʻele, ʻeleʻele ka caviar, a laila ʻoliʻoli. Inā ʻaʻohe kāne kāne, a laila kau ka wahine i nā hua i loko o ka ʻulaʻula māmā, akā ʻaʻole i loaʻa nā hua mai loko mai. Hiki i hoʻokahi wahine ke lawe i 200 a keu paha mau hua. Hoʻomoe ka hoʻomohala ʻana i nā hua ma kahi o 3 mau pule.

Nui loa kēia mau crayfish no ka mea ʻaʻole lākou i lohi, ʻaʻole palupelu a hiki ke pua i ka noho pio ʻana.

ʻO ka maʻi maʻi florida ʻula

ʻOiai ke ʻōlelo ʻana o ka inoa ʻo Florida kahi i hānau ʻia o kēia mau maʻi, ʻo lākou nō ia mai Louisiana. Hoʻokomo ʻia no ka palaka ʻo Florida: nā muliwai, nā ʻolo, nā loko, nā loko a me nā ʻulā wai. I ka wā maloʻo, ʻeli nā crayfish i nā mink hohonu hohonu.

ʻAʻole koi kēia holoholona i ka maikaʻi o ka wai. Loaʻa ka nui o ka nui o ke kino ma kahi o 12 kenimika. ʻUlaʻulaʻula nā kino, me nā kala like ʻole. Akā, loaʻa i keʻokeʻo, keʻokeʻo, ʻulaʻula a me ka ʻoni a me nā palaka ʻo Florida. I nā claws ua loaʻa i nā mapu ulaula.

Hiki ke hōʻoluʻolu kēia ʻano i kahi mahana o 5-30 degere. ʻOiai ka polanelo a ka Florida ka palena hema, e ʻae lākou i ka winters ʻEulopa.

No kahi pākahi o nā kanaka, kūpono kahi aquarium me ka nui o 100 lita. ʻO nā maʻa pinepine kēia mau paʻi i ka iʻa. I ka pio, hānai pū maikaʻi lākou a hiki i ka wā ma waena o ka makahiki. Kūpono ka wahine i nā hua he 200.

Hiki i kēia mau pelu ke kū i ka nui o nā mahana: mai 5 a 30 degere.

Nā Kahu Herrē Hōʻī

I kēia manawa, ua hoʻomaka nui nā crayfish mai New Guinea a me Australia. ʻO ka inoa o kēia mau palulu ʻia e lohe ʻia e nā pepeiao o Rūsia ma Herax. ʻAʻole naʻe i wehewehe ʻia ka hapa nui o kēia mau maʻi. Ma waena o ka Herax aia kahi nui nui e hiki ke hiki i ka 40 kenimika ka lōʻihi a kaupaona hoʻi e pili ana i ka 3 kilogram. Akā aia kekahi mau mea liʻiliʻi ʻē aʻe i kūpono no nā pākuʻi liʻiliʻi.

ʻO nā kūlana crayfish o Australia e like me nā mea i hōʻike ʻia ma luna nei. Hoʻokomo ʻia kahi aquarium o 150 ma 150 kenimika no lākou. No nā holoholona liʻiliʻi, kūpono nā mea kanu me ka nui o 20 lita. Hōʻemi maikaʻi ka loaʻa ʻana o ka Australia i ka wela.

Pono maluhia ko lākou, he ʻāpana ʻulaʻula, i ʻole nā ​​mea nānā ʻole i ka iʻa. Akā makemake lākou i ka eli ʻana i ka lua i ka lepo a ʻuwī i nā mea kanu.

Loaʻa i ka poli Pula Cuban ke kala a he ʻano maluhia hoʻi.

Lawe a ʻo ka wahine i 60 mau huaʻehā. Hoʻokumu ʻo Caviar i nā 1-1.5 mau mahina. ʻO ka lōʻihi o ke kino o nā ʻōpala lahilahi a ma kahi o 8 kūleʻa. Me ka wahine, noho lākou no 2 mau wiki a hiki i ka hiki ʻana i 12 kekelē.

Inā kū ka Herax i ka pōʻino, hoʻohālike lākou i ka make, e kaomi i kā lākou mau wāwae a paʻa ʻole no kahi manawa ma lalo.

Inā loaʻa ʻoe i kahi hala, e koho i kahi ʻāpana a me ka paʻi Ctrl + Kākau.

Pehea e hānai ai i ka ihu

He aha nā ʻano meaʻaiʻai e pono ai ke hāʻawi ʻia i ʻike ʻole lākou e nānā.

He mea maikaʻi no nā poʻe hoʻomaka. He mau makaʻala ʻia kāu mau lālā i ka wā e hiki mai ana, akā no lākou e hōʻoluʻolu maikaʻi, pono lākou i nā ʻano kai o nā mea kanu a me ka hoʻomaka ʻana holoholona. Manila ʻia i nā meaʻai nāhele ʻē aʻe, no ka laʻana, i kekahi lā, hāʻawi ʻoe i ka meaʻai meaʻai, a me ka ʻai ʻai aʻe.

He ʻoi aku ka maikaʻi i ka hāʻawi ʻana i ka meaʻai i ke ahiahi, no ka mea i ke ao polu e noho malū a ʻai liʻiliʻi.

I nā hale kūʻai maʻalahi hiki ke maʻalahi ke kūʻai aku i ka meaʻai no ka crayfish. ʻO nā mea momona ʻehā nui o nā:

He mea kūpono ia e hāʻawi i nā mea ʻai kūikawā no ka crayfish, ʻaʻole lākou me nā mea āpau e pono ai, akā he mea kōkua pū nō hoʻi i ka wā molting, hoʻomaikaʻi i ke kala o kā lākou ʻoki a ʻaʻole hōʻino i ka wai. Loaʻa i ka poʻe akamai i loko o nā mea hoʻonaʻauao loea ka mea e hoʻomaikaʻi ai i ke ʻano o nā ʻōpiopio, a me kekahi mau mea hoʻohui i loko o lākou e hoʻoulu ai i ka hana hou.

Loaʻa ka Whan Crayfish i nā ʻano like ʻole. Hiki iā ia ke mauola no nā ʻāpana like ʻole, ʻōpala, a me nā mea nui ʻole, ʻaʻole ia he mea nui ʻole, ʻai nui kā lākou aquarium crayfish me ka leʻaleʻa maikaʻi.

Pono ʻoe e ʻike he ʻai maikaʻi ka ʻai ʻana a me ka meaʻai maloʻo maʻamau, ka mea maʻamau i ka ʻai ʻana i ka iʻa.

He mea maikaʻi a paʻakikī paha ka hoʻopaʻapaʻa ʻana, akā naʻe, ʻoi aku ka maikaʻi ʻana o ka ʻai.

I kaʻaiʻana o ke kanesa, noho nā meaʻai o ka mea kanu i ka liʻiliʻi he 90 pakeneka. ʻO ka pāo manuahi punahele punahele ʻo ka pūkihi.

ʻAe like ka Crayfish i ka lettu a me nā kāpeti China, a ʻo ʻolua maʻamau. ʻAʻole wale ia e hiki ke hāʻawi i nā kaloti i nā kano, akā pono naʻe, no ka mea ke loaʻa ka keratin, e hoʻolilo i nā ʻano o nā paleka ʻaula.

ʻO ka hānai holoholona maikaʻi loa no nā mahiʻai:

• lamakokaho
• iʻa
• pūnu,
• hopa
• iʻa
• ʻai momona.

E like me kā mākou i ʻōlelo ai, he ala ʻino ka crayfish e hūnā i ka meaʻai, i ka mālama - hoʻihoʻi i nā mea āpau i ko lākou hale liʻiliʻi. No laila, hāʻawi kekahi e hāʻawi i nā mea a lākou e ʻai ai. Inā ʻaʻole, e emi iho ka meaʻai huna a make i ka wā lōʻihi, e pio ka wai i loko o ka hale aku.

Aia kekahi pilikia hou aʻe, e like paha me ka puʻuwai. Hiki i kahi hale mālama maikaʻi ke hōʻeha i nā maʻi maʻa mau. ʻO Detritus, kahi huahana decomposie organik, he waiwai koʻikoʻi loa ia no ka crayfish aquarium. Loaʻa nā microorganism e hoʻokūkū i ka microclimate i loko o ka aku aku a he meaʻai hou.

ʻO ka ulu liʻiliʻi, no ka ulu maikaʻi a me ka hoʻoikaika ʻana i ka pale ʻana, pono e hāʻawi ʻia i kahiplia artemia a me kahi nematode acetic. Inā hāʻawi ʻoe i nā cyclops a me daphnia liʻiliʻi, a laila e noʻonoʻo ʻoe e ninini iā ​​lākou me ka wai i hoʻolapalapa ʻia, inā ʻole ʻaʻole hiki i nā crustaceans ke hopu iā lākou. Akā, he mea kūpono e ʻike ka hiki i kēia mau meaʻai ke hoʻohaumia i ka wai.

Inā hoʻokomo maikaʻi nā crayfish, ulu nui lākou, a hele pinepine ka molting.

He mea hiki ke hoʻoulu i ka māakui

Hiki i ka hoʻouluulu ʻana o nā iʻa i loko o ka māhu, a ua loaʻa i nā limahana he nui i ka hopena i loko o kēia hana, e hoʻāʻo nei e hoʻomaʻamaʻa a hoʻoulu hou i nā huaʻi hou. I ka wā moe, ka mea e hele ai i ka wahine ma hope o ke hoʻoheheʻe ʻia ʻana, hoʻokuʻu lākou i nā pheromones kikoʻī i loko o ka wai, i like ʻole ke kāne male, e ʻoliʻoli nui ai lākou. Hoʻomaka lākou e neʻe hou aku, i ka ʻimi ʻana o kahi wahine i mākaukau no ka hoʻoulu ʻana, ka loaʻa ʻana o nā hola he nui lākou i hiki iā lākou ke paʻi me kekahi me nā antennas.

I iwakālua mau lā ma hope o ka moe ʻana, hoʻomaka ka wahine e waiho hua, nā mea i hoʻopili ʻia ma kona mau wāwae me nā kaula ʻono. I kēia manawa, makemake ia e hoʻololi a mālama paʻa iā ia. ʻO ka wahine me caviar e hoʻōla i ka puʻe i kekahi mau wahi a, inā pono, e kiaʻi lākou i kona hale liʻiliʻi. ʻO nā pala liʻiliʻi i hānau ʻia ma ka wahine a hiki i ka mollet, eia naʻe, i ka wā e hiki mua ana, e noho kokoke, inā hiki i ka pōpilikia ke hoʻi koke lākou ma lalo o ia.

Hiki paha ke hoʻomau i ka mahiʻai ʻana me ka iʻa

ʻO ka paʻa ʻana o nā iʻa me ka iʻa e pili pū ana me kekahi mau pilikia. ʻO ka pinepine, ʻo ka palupalu a me ka iʻa pūlima me ka maluhia i loko o ka lāʻau like me ka nui o nā wā like, akā aia ka nui o nā hihia i ka "i hiki keʻole". Hoʻomaʻamaʻa pinepine, nā crayfish i ka pō e hopu a ʻai i nā iʻa nui a i kumu kūʻai nui. A i ʻole, inā nui loa ka iʻa, hiki iā ia ke luku i ka maʻi i ka wā o ka molting.

Ke hōʻuluʻulu ʻana, hiki ke ʻōlelo ʻia i ka hiki ʻana o ka pili ʻana o ka iʻa me ka iʻa i kekahi lā i ka hopena. ʻO ka maʻa mau inā ʻoe i nā kalaka me ka iʻa lohi a i ʻole ka poʻe e noho kokoke ana ma lalo. Eia naʻe, ʻo kahi gupeshka nimble, hiki i ka maʻi maʻi ke hopu i ka ʻalā a me ka mea puʻu i ka hapalua, nā hihia like loa.

He mea hiki ʻole i ka hui ʻana o ka crayfish me nā iʻa o ka ʻohana cichlid, ʻoi pū me nā poʻe nui. Eia ka laʻana, hiki i kekahi o kēia mau iʻa ke hōʻulu i nā ʻōpū nui loa, a i ka wā e hoʻoneʻe ai ke kanikau, ʻoi aku ka mea liʻuliʻi ʻē aʻe no lākou. ʻO ka hōʻuluʻulu ʻana, hiki iā mākou ke ʻōlelo i ke kano a me nā iʻa kahi pilikia ʻē aʻe.

Me nā ʻeke kalaka ʻo nā mea like ʻole e hiki ke mālama ʻia, e ʻai wale ana lākou.

ʻO kekahi mau ʻano o nā kēpana e hōʻeha nui i ka eli a me ka hehi ʻana i nā mea kanu. Ma ka holoʻokoʻa, ka hoʻāʻo ʻana e kanu i nā mea kanu i loko o ka pūnaehana crayfish ʻoi aku ka manawa. Mai ka wā e ʻai wale ai lākou.

Akā aia kahi mea leʻaleʻa maikaʻi, inā makemake maoli ʻoe i nā vela ola a me nā mea kanu i kāu aquarium, a laila e kiʻi i kahi maʻi aquarium Mekiko, kahi maluhia loa, liʻiliʻi a ʻaʻole hōʻino i nā mea kanu.

Hiki paha ke mālama i ka crayfish i loko o ka aquarium?

Hiki iā ʻoe ke mālama palekana i ka crayfish ma ka loko aku, ʻo ka mea pono wale nō ʻoe e ʻike i ka maʻamau maʻamau ʻaʻole e noho lōʻihi a i ʻole he iʻa a me nā mea kanu i loko o ka aquarium. ʻO ka palaka maʻamau ʻo ia ka nui a paʻakikī; hopu wale a ʻai i nā iʻa maikaʻi. Inā kanu ʻia nā mea kanu i ka hale akuʻa, a laila e lele ʻo ia iā lākou. ʻAʻole noho ka Crayfish i nā kūlana aku aku no ka lōʻihi, no ka mea, no nā ʻano wai anu. I loko o kā mākou latina, ka wai mahana wale nō e tupu i ke kauwela, a no laila, ma ka haʻahaʻa he meaʻoluʻolu loa. I loko o ka pūlima, hoʻāla me ka wai ma mua o ka mea e pono ai. I ka huaʻōlelo, hiki ke mālama ʻia kā mākou kaaka i loko o ka mea kanu, akā ke kaʻawale wale nō i ka iʻa a me ka mea ʻole ʻana i nā mea kanu, a i ka manawa like e noʻonoʻo e pili ana i ke ʻano o ka hoʻōla ma ke kauwela wela ʻaʻole e piʻi kiʻekiʻe ka wai.

I ka nui e hiki ai ke maʻi i ka maʻi maʻi?

ʻO ka nui loa o nā ʻōpū mākeke ke hilinaʻi nui ʻia i nā ʻano. No ka likeʻana, ulu pinepine nā pēpē nui o Tasmania i ka hapalua mika i ka lōʻihi, a hiki ke kaupaona nei i hiki i ʻelima kilokilo. ʻOi aku ka liʻiliʻi o nā mea ʻē aʻe a maʻamau e ulu i nā makahiki he ʻumikumamālua a i ʻumikūmākolu o ka lōʻihi.

ʻO ka ulu o ka crayfish i loko o ka aquarium e hilinaʻi nui i nā kūlana he nui, ʻo ka mea nui i ka nui o ka aquarium ia ka nui a me ka helu o kēlā me kēia kanaka.

E hāhai i kēia mau ʻōmole a e hoʻonani ʻia kou hale i ka aquarium chic kahi e hōʻoluʻolu ʻia ka crayfish.