Nautilus Releases a NI 43-101 Technical Report for Polymetallic Nodules

TORONTO, ONTARIO--(Marketwired - Jul 4, 2016) - Nautilus Minerals Inc. (TSX:NUS)(OTCQX:NUSMF) (OTC:NUSMF Nasdaq Intl Designation) (the "Company" or "Nautilus") announces that it has filed on SEDAR a technical report in respect of the Clarion Clipperton Zone Project being undertaken by its wholly owned subsidiary Tonga Offshore Mining Limited (TOML), entitled "NI 43-101 Technical Report TOML Clarion Clipperton Zone Project, Pacific Ocean" (Technical Report).

The Technical Report describes in detail the upgrade and increase in the Mineral Resource estimate for TOML's polymetallic nodule project that the Company announced on May 26, 2016 (see links section below). The Technical Report also provides more information regarding the exploration, technical aspects and historical work completed in the Clarion Clipperton Zone.

Links:

http://www.nautilusminerals.com/irm/PDF/1797/NautilusUpgradesandIncreasesCCZMineralResourcetoover685milliontonnes

The Technical Report has been filed on www.sedar.com and is also available on the Company's website at this link: http://www.nautilusminerals.com/IRM/ShowCategory.aspx?CategoryId=306&FilterStyle=B&archive=true&masterpage=311&year=2013&RID=402

For more information please refer to www.nautilusminerals.com.

Neither the TSX nor the OTCQX accepts responsibility for the adequacy or accuracy of this press release.

About Nautilus Minerals Inc.

Nautilus is the first company to explore the ocean floor for polymetallic seafloor massive sulphide deposits. Nautilus was granted the first mining lease for such deposits at the prospect known as Solwara 1, in the territorial waters of Papua New Guinea, where it is aiming to produce copper, gold and silver. The Company has also been granted its environmental permit for this site.

Nautilus also holds highly prospective exploration acreage in the western Pacific (granted and under application), as well as in international waters in the Central Pacific.

A Canadian registered company, Nautilus is listed on the TSX:NUS stock exchange and trades on the OTCQX:NUSMF, and is also a member of the Nasdaq International Designation program. Its corporate office is in Brisbane, Australia. Its major shareholders include MB Holding Company LLC, an Oman based group with interests in mining, oil & gas, which holds a 27% interest and Metalloinvest, the largest iron ore producer in Europe and the CIS, which has a 15% holding (each on a non-diluted basis, excluding loan shares outstanding under the Company's share loan plan).

Contact

Nautilus Minerals Inc. (Toronto)
Investor Relations
+1 (416) 551 1100
investor@nautilusminerals.com
www.nautilusminerals.com
Principal American Liaison
Euro Pacific Capital, Inc.
88 Post Road West, 2nd Floor
Westport, CT 06880
1-203-662-9700
Attn: Thomas Tan ttan@europac.net