Butis koilomatodon

Butis koilomatodon, wanda aka fi sani da mudsleeper, nau'in kifaye ne a cikin dangin Butidae wanda ya samo asali ne daga ruwan gishiri, mai laushi da ruwan gishiri na yankin Indo-Pacific, wanda ya fito daga Madagascar da Mozambique zuwa Philippines, China da Australia.   An gabatar da shi zuwa yankin Atlantic inda aka yi la'akari da cin zarafi kuma an san shi daga Panama, Venezuela da Brazil  da kuma Najeriya.  Wannan nau'in namun daji galibi yana rayuwa ne a cikin koguna, rairayin bakin teku da mangroves, kuma ya kai har zuwa  a cikin jimlar tsayi. 

 Gabatarwa ga Brazil 
B. koilomatodon suna fadada kewayon su zuwa kudu maso yammacin Atlantic tare da bakin tekun Brazil. An samo shi a gabashin gabar tekun Brazil, a cikin 1989, amma ba a gano shi ba har zuwa 2000. Ya zuwa lokacin rani na shekara ta 2012, an tattara samfurori 23 na B. koilomatodon a bakin tekun Brazil, an tattara dukkan samfurori a wurare daban-daban guda shida a bakin tekuna. Masana ilimin halittu sun sami damar gano 17 daga cikin samfurori a matsayin namiji, hudu a matsayin mace, kuma wasu biyu ba su iya yin jima'i ba. Kuma yawancin samfurori sun kasance a matakai daban-daban na balaga, ana iya kafa yawan kiwo, amma ana tattara isasshen bayanai don kammala shi a ƙarshe. Ta yaya wannan nau'in ya kai wancan gefen nahiyar Kudancin Amurka ba a bayyane yake ba. Mutane da yawa sun yi imanin cewa an kawo su a cikin tankunan jiragen ruwa. Ƙananan girman nau'in ya sa ya zama da sauƙi a gare su shiga ramukan da ke cikin tankin jirgin ruwa. Har ila yau, ikon su na jurewa da matakan salinity masu yawa, da kuma sauye-sauyen zafin jiki, ya sa su iya zama a cikin tankin ballast a kan tafiye-tafiye a fadin teku.

 Manazarta