| Beatriz Mesquita | 
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| Born |  (1991-04-07) 7 April 1991 | 
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| Other names | "Bia" Mesquita | 
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| Residence | Florida, United States | 
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| Nationality | Brazilian | 
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| Height | 5 ft 2 in (157 cm) | 
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| Division | Peso Leve (Lightweight) (BJJ)   Bantamweight (MMA) | 
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| Style | Brazilian Jiu-Jitsu | 
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| Team | Gracie Humaita (BJJ)   American Top Team (2023–present) | 
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| Trainer | Leticia Ribeiro | 
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| Rank | 2nd degree black belt in Brazilian Jiu-Jitsu under Leticia Ribeiro | 
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| Years active | 2023–present (MMA) | 
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 | 
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| Total | 4 | 
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| Wins | 4 | 
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| By submission | 3 | 
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| By disqualification | 1 | 
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| Losses | 0 | 
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| Mixed martial arts record from Sherdog | 
    
    
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| Representing  Brazil |  
| Submission Wrestling |  
| ADCC Submission Wrestling World Championship |  
 | 2017 Espoo, Finland | –60kg |  
 | 2022 Nevada, USA | –60kg |  
 | 2024 Nevada, USA | –65kg |  
 | 2024 Nevada, USA | Absolute |  
| Brazilian Jiu-Jitsu |  
| World Championship |  
 | 2012 California, USA | –64kg |  
 | 2013 California, USA | Absolute |  
 | 2013 California, USA | –64kg |  
 | 2014 California, USA | Absolute |  
 | 2014 California, USA | –64kg |  
 | 2015 California, USA | –64kg |  
 | 2016 California, USA | –64kg |  
 | 2018 California, USA | –64kg |  
 | 2019 California, USA | –64kg |  
 | 2021 California, USA | –64kg |  
| Pan American Championship |  
 | 2011 California, USA | –64kg |  
 | 2012 California, USA | –64kg |  
 | 2014 California, USA | Absolute |  
 | 2014 California, USA | –64kg |  
 | 2015 California, USA | –64kg |  
 | 2016 California, USA | –64kg |  
 | 2018 California, USA | –64kg |  
 | 2018 California, USA | Absolute |  
| European Championship |  
 | 2010 Lisbon, Portugal | Absolute |  
 | 2010 Lisbon, Portugal | –69kg |  
 | 2017 Lisbon, Portugal | –64kg |  
 | 2018 Lisbon, Portugal | –64kg |  
| Brazilian National Championship |  
 | 2017 Sao Paulo, Brazil | –64kg |  
 | 2019 Sao Paulo, Brazil | –69kg |  
 | 2019 Sao Paulo, Brazil | Absolute |  
| Worlds Nogi Championship |  
 | 2010 California, USA | –61.5 kg |  
 | 2011 California, USA | –61.5 kg |  
 | 2012 California, USA | –61.5 kg |  
 | 2018 California, USA | –66.5 kg |  
 | 2018 California, USA | Absolute |  
| Brazilian Nationals Nogi Championship |  
 | 2009 Rio de Janeiro, Brazil | –61.5 kg |  
 | 2011 Rio de Janeiro, Brazil | Absolute |  
 | 2011 Rio de Janeiro, Brazil | –61.5 kg |  
 | 2014 Rio de Janeiro, Brazil | Absolute |  
 | 2014 Rio de Janeiro, Brazil | –66.5 kg |  
 | 2016 Rio de Janeiro, Brazil | Absolute |  
 | 2016 Rio de Janeiro, Brazil | –66.5 kg |  
 
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Beatriz Mesquita also known as Bia Mesquita is a Brazilian Jiu Jitsu (BJJ) competitor with arguably the best competitive record in both Gi and Nogi of all time having won 24 titles at black belt level in the 4 major Gi Championships.  With 10 gold medals, as of Worlds 2021, she holds the record for the most IBJJF World Championship titles at black belt level and is a member of the IBJJF Hall of Fame.