|Alma mater||Başkent University, Ankara|
Born on January 16, 1985 in Çanakkale, she was educated at the Gazi Primary School, and received a secondary education at the Milli Piyango Anatolian High School in her hometown. For her higher education, she moved to Ankara, and became a dietitian graduating from the Department of Nutrition and Dietetics at Başkent University's Faculty of Health Sciences.
Her participation in underwater sports began with scuba diving and underwater rugby. For twelve years, she is interested in various branches of underwater sports, and is a member of four national teams since 2001. She participated with the underwater hockey, underwater rugby, underwater orienteering and free diving national teams in the World and European Championships.
Her 110 m (360 ft) long dynamic apnea under ice (DYN) that was achieved on February 11, 2011 in Lake Weissensee, Austria, found entry into the Guinness Book of World Records for both for men and women. Former records were 70 m (230 ft) for women and 108 m (354 ft) for men.
Şahika Ercümen is former world record holder of constant weight with fins at sea (CWT) discipline with 70 m (230 ft) set in Dahab, Egypt on November 10, 2011 (recognized by CMAS). The former record belonged to Tanya Streeter with 67 m (220 ft). The same day at the same place, she set another CMAS-recognized world record diving 60 m (200 ft) deep in variable weight apnea without fins at sea (VNF).
On June 1, 2013, she broke her own world record diving in the VNF discipline to a depth of 61 m (200 ft) in saline soda waters of Lake Van, eastern Turkey (recognized by CMAS). She stated that she preferred the site for her world-record free-diving attempt because she wanted to call world's attention to the migration of Pearl Mullet (Chalcalburnus tarichi), also called Lake Van fish.
She set a new free-diving world record in the VNF discipline reaching the 91 m (299 ft) depth mark in 2:49 minutes at Kaş, Antalya, southern Turkey on July 23, 2014. Former record in this discipline, which was set the previous year, belonged to Derya Can, another Turkish diver.
On October 22, 2016, Ercümen set a new world record off Kaş, Turkey diving to a depth of 110 m (360 ft) in the variable weight apnea with fins at sea (VWT) discipline in 2:44 minutes. Her record was recognized by CMAS officials at site.
- DYN under ice 110 m (360 ft) - February 11, 2011 in Lake Weissensee, Austria
- CWT 70 m (230 ft) - November 10, 2011 in Dahab, Egypt
- VNF 60 m (200 ft) - November 10, 2011 in Dahab, Egypt
- VNF 61 m (200 ft) - June 1, 2013 in Lake Van, Turkey
- VNF 91 m (299 ft) - July 23, 2014 in Kaş, Antalya, Turkey
- VWT 110 m (360 ft) - October 22, 2016 in Kaş, Antalya, Turkey
- Sweet water 65 m (213 ft) - October 26, 2018 in Lake Salda, Yeşilova, Burdur, Turkey
- Erdem, Arif (2010-01-31). "Dalışta Türkiye basamakları çıkmaya başladı". Hürriyet (in Turkish). Retrieved 2013-06-17.
- "Guines Rekorlar Kitabı'na giren son Türk". Hürriyet (in Turkish). 24 February 2011. Retrieved 11 April 2011.
- "Denizkızı Şahika rekor peşinde!". Sabah (in Turkish). 2011-11-04. Retrieved 2013-06-17.
- "Şahika Ercümen dünya rekoru kırdı". Sabah (in Turkish). 2011-11-11. Retrieved 2013-06-17.
- "Şahika rekor kırdı". Hürriyet (in Turkish). 2011-02-13. Retrieved 2013-06-17.
- "Şahika Ercümen Breaks Diving Record". TRT World. 2011-02-12. Retrieved 2013-06-17.
- "Turkish athlete Şahika ERCÜMEN made her world record attempts in the famous Blue Hole, Dahab, Sinai Peninsula-Egypt". CMAS. 2011-11-14. Retrieved 2013-06-17.
- "Şahika Ercümen'den dünya rekoru". Sabah (in Turkish). 2013-06-01. Retrieved 2013-06-17.
- "World Record From Şahika Ercümen In Lake Van!". Dive With Seman. 2013-06-03. Retrieved 2013-06-17.
- "Turkish diver Şahika Ercümen breaks new freediving record". Hürriyet Daily News. 2014-07-23. Retrieved 2016-10-23.
- Acar, Ahmet (2016-10-22). "Şahika Ercümen'den 110 metre dalışla yeni dünya rekoru". Hürriyet (in Turkish). Retrieved 2016-10-23.
- "Şahika Ercümen'den dünya rekoru!". Habertürk (in Turkish). 26 October 2018. Retrieved 27 October 2018.