Profile updated on 11 February 2022





Metacarcinus edwardsii


Mola rock crab, Jaiba marmola, stone crab

Mola rock crab distributes from the Arica Region to the Magellan Strait in Chile (Retamal et al. 2009; Martinez 1986; in (Pardo et al. 2017)) and to the Beagle Channel (Vinuesa et al. 1999), from intertidal to 42 (Henriquez y Bahamonde, 1976 in (Pardo et al. 2017) or to 130 m deep (Campos, 1992 in (Pardo et al. 2017)). Genetic variation in individuals over 300 km apart has shown no significant variances, even when there are oceanographic conditions that difficult the process of larval transport, these conditions were not an obstacle for M. edwardsii (Rojas-Hernandez et al. 2014). Furthermore, there is high genetic connectivity along with the entire distribution in Biobio, Los Rios, Los Lagos, and Aysen Regions given its large dispersion capability (Ferrada Fuentes et al. 2018)

Traditionally, this species has been englobed in a pool species called “jaibas” (crabs) for Chilean administration and fishermen, and it was not until the 90s that it was considered as a single resource in administration records (Yañez et al. 2015), accounting for a source of uncertainty in previous years.

Management (Subpesca) stands for the entire country, but assessments have focused on the most productive areas: Biobio, Los Lagos, and Aysen Regions (Yañez 2017). Los Lagos Region is the one providing most landings for the country with Aysen Region in second place, although with a considerable difference (Pool et al. 1998; Yañez 2017). Additionally, several programs and research has been implemented at Ancud bay, in Los Lagos Region, which could bring light into the entire stock.


  • This resource has a high reproductive potential and no recognized dispersion barriers, both important for recovery plans.


Management Quality:

Management Strategy:

< 6

Managers Compliance:

< 6

Fishers Compliance:

< 6