The roundscale spearfish (Tetrapturus georgii) is an Istiophoridae species of marlin living in the epipelagic zone of the Atlantic Ocean.

The roundscale spearfish, described in 1841 by Lowe, is a Teleostei fish of the order of the Carangformes (jacks) and of the family of Istiophoridae (Billfishes).

But in 2006, genetic discoveries have led to a genus change for the white marlin to Kajikia albidia and to a validation of the species Tetrapturus georgii thanks to molecular and morphological evidence.

With lacking data for a proper population assessment simulation, an uncertainty hangs over the needed conservation status and management.

[7] As said before, the identification between T. georgii and Kajikia albida (white marlin) can be done thanks to a close scale shape examination.

[6] Tetrapturus georgii has asymmetrical gonads and a presence of swim bladder, consisting of many small bubble-shaped chambers essential for buoyancy regulation.

Most specimens of this species are found in Madeira, Sicily, the Straits of Gibraltar, and the adjacent Atlantic Ocean off southern Portugal.

The lack of comprehensive data on billfish species, combined with the challenges of studying these elusive marine animals, lead to poor social structure and behavioral understanding.

As T.gerogii has long been misidendified as white marlin, no specific total landings or stock assessment are existing.

The projections are full of uncertainty because of bad fish mortality assessment due to an inadequate reporting of discards as well as a lack of data from recreational fisheries.

Combine with a respect of TAC, size limitation and quick release, it could represent some practical solution for a reduce human footprint.

[16][17] By only accounting for 5% of the total landing,[10] recreational fisheries represents a multimilliard dollar sector in developed countries targeting white marlin and roundscale spearfish seamlessly.

But despite a high alive release, the energy expenditure and the physiological stress resulting from capture and handling lead to a possible post-release mortality of about 20%.