The type specimen was collected in South Australia BY (WILLIAM) LAWRENCE BRAGG [John Jenkin, WILLIAM AND LAWRENCE BRAGG, FATHER AND SON, OXFORD UNIVERSITY PRESS, 2008, 2011, p.245] and was described by Sir Joseph Cooke Verco in 1907.
Sepia braggi is one of three species of cuttlefish known to inhabit Spencer Gulf in South Australia. Specimens are occasionally caught there by prawn trawlers. Trawl bycatch specimen sizes range from 27 to 57 mm and have been collected during trawls in mid and southern gulf waters.
- Barratt, I.; Allcock, L. (2012). "Sepia braggi". The IUCN Red List of Threatened Species. 2012: e.T162629A932030. doi:10.2305/IUCN.UK.2012-1.RLTS.T162629A932030.en. Downloaded on 14 February 2018.
- Julian Finn (2016). "Sepia braggi' Verco, 1907". World Register of Marine Species. Flanders Marine Institute. Retrieved 14 February 2018.
- "Slender Cuttlefish – Sepia braggi Verco, 1907 - Australian Museum". australianmuseum.net.au. Retrieved 2016-06-19.
- Australia, Atlas of Living. "Sepia braggi : Slender Cuttlefish | Atlas of Living Australia". bie.ala.org.au. Retrieved 2016-06-19.
- Steer, Michael A. (2015). Surveying, searching and promoting giant Australian cuttlefish spawning activity in northern Spencer Gulf (PDF). Adelaide, South Australia: SARDI. pp. 61–66. ISBN 978-1-921563-74-4.