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  3. Juan Fernandez Rock Lobster

One of the 4 spiny lobsters on WAnimals

Juan Fernandez Rock Lobster (Jasus frontalis)

Malacostracans · Decapoda · Palinuridae

Juan Fernandez Rock Lobster

Jasus frontalis

Data Deficient

There is not enough information to assess its risk of extinction.

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A clawless lobster endemic to the Juan Fernández archipelago and the Desventuradas Islands, off Chile. It lives among the volcanic rocks of these oceanic islands and comes out at night to feed. It is the main source of income for the people of Robinson Crusoe Island, and its fishery — with traps, a minimum size and a closed season — is a much-cited case of community management of a resource.

Size

20 cm – 50 cm

Diet

Omnivore

Combines animal and plant food depending on availability.

Activity

Nocturnal

Active mainly at night.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Ocean
1countries1parks1dive sites2same family

AI-generated images: illustrations, not photographs.

Fun facts

  • The fishery has been managed by the islanders themselves for more than a century, with closed seasons, minimum sizes and the compulsory return of egg-bearing females.
  • It is endemic to a tiny archipelago in the middle of the Pacific, which makes it extremely vulnerable to any failure of management.
  • It is a strict endemic of the Juan Fernández archipelago and the Desventuradas Islands, and lives nowhere else in the world.
  • It is the economic backbone of Robinson Crusoe Island: practically the entire population depends on its fishery, which is exported live to Asia and Europe.
  • And that fishery has been managed for more than a century under a remarkable community system: the fishers themselves established a closed season, a minimum size, protection for berried females and an informal system of rights over trap grounds that is respected by local agreement, with no need for outside enforcement.
  • That model is cited internationally as an example of sustainable artisanal fisheries management maintained by the community itself.
  • It has no claws: like all spiny lobsters, it defends itself with its spiny antennae and with its backward dash.
  • Its larval phase is extremely long, more than a year in the open sea, which makes recruitment depend on the currents and vary greatly from year to year.

Life cycle and biology

Skeleton type
Invertebrate - chitin exoskeleton (crustacean)
Habitat and environment
Volcanic rocky bottoms of oceanic islands in the south-eastern Pacific, from 0 to 200 m

Sources consulted: Wikipedia (es): Jasus frontalis

Where to find it

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The pins mark the parks and dive sites where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Juan Fernandez Rock Lobster — same habitat, park, country, tags or family.

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Same taxonomic family
Same taxonomic family
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See its range on the interactive map→
Juan Fernández ArchipelagoChile
Robinson Crusoe Island (Juan Fernández)Chile
Blue SharkNear Threatened

Blue Shark

Prionace glauca

Caribbean Spiny LobsterData Deficient

Caribbean Spiny Lobster

Panulirus argus

Common Spiny LobsterVulnerable

Common Spiny Lobster

Palinurus elephas

Humpback WhaleLeast Concern

Humpback Whale

Megaptera novaeangliae

Endangered

Shortfin Mako

Isurus oxyrinchus

Humboldt SquidNot Evaluated

Humboldt Squid

Dosidicus gigas

CountriesChile
ParksJuan Fernández ArchipelagoChile
TagsOmnivore
Omnivore
Nocturnal
Solitary
Ocean
Crustacean
Chile