Marieke Katherine D'Cruz (née Guehrer; born 9 February 1986) is an Australian swimmer who is the former world record holder in the 50 metres butterfly short course. She clocked 24.99 seconds^[1]

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Marieke D'Cruz

Personal information
Full name	Marieke Katherine D'Cruz (née Guehrer)
Nickname	MG
Nationality	Australia
Born	(1986-02-09) 9 February 1986 (age 38) Adelaide, South Australia, Australia
Height	1.85 m (6 ft 1 in)
Weight	74 kg (163 lb)
Sport
Sport	Swimming
Strokes	Backstroke, Butterfly, Freestyle
Club	SOPAC
Medal record Representing  Australia World Championships (LC) 2009 Rome 50 m butterfly 2009 Rome 4×100 m freestyle World Championships (SC) 2012 Istanbul 4×100 m freestyle 2012 Istanbul 4×100 m medley 2010 Dubai 4×100 m medley Pan Pacific Championships 2010 Irvine 50 m butterfly Commonwealth Games 2010 Delhi 4×100 m freestyle 2010 Delhi 50 m butterfly Universiade 2011 Shenzhen 4×100 m freestyle 2011 Shenzhen 50 m butterfly

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After her breakout meet in late 2008, D'Cruz broke her personal best times in several events, also breaking the short course 50 m butterfly world record. At the 2009 Telstra Aus trials, she earned an individual spot in the 100 m freestyle clocking 54.28 along with a spot on the 4×100 m freestyle relay team. The next day she clocked 25.60 s in the 50 m Butterfly, easily making the qualifying time and becoming the third fastest in history in that event, after some thunderous times posted in the semi-finals, the fasted qualifiers failed to match their times in the final, and Guehrer won gold.

At the 2009 World Aquatics Championships, D'Cruz picked up her first medal on day one with a bronze medal in the 4×100 m freestyle relay. With a tremendously fast semi-finals in the 50 m butterfly, from lane 6 Guehrer caused an upset capturing gold.

At the 2010 Commonwealth Games, D'Cruz won silver in the 50m butterfly final to Francesca Halsall and won gold in the 4×100 m freestyle relay.

• LONG COURSE (50m Pool)
  • 50m butterfly– 25.48 (Commonwealth Record)
  • 100m butterfly – 58.08
  • 50m freestyle – 24.87
• SHORT COURSE (25m Pool)
  • 50m butterfly– 24.69 (Commonwealth Record)
  • 50m freestyle – 23.74 (Commonwealth Record)
  • 50m backstroke – 25.98 (Commonwealth Record)
  • 50m butterfly 100m backstroke (Australian Record)

• List of World Aquatics Championships medalists in swimming (women)
• List of Commonwealth Games medallists in swimming (women)
• World record progression 50 metres backstroke
• World record progression 50 metres butterfly