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Ranina ranina   (Linnaeus, 1758)

spanner crab

Native range
Reviewed map
Ranina ranina  AquaMaps  Data sources: GBIF OBIS
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Image of Ranina ranina (spanner crab)
Ranina ranina
Picture by Poppe, Guido and Philippe

Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Malacostraca | Decapoda | Raninidae

Environment: milieu / climate zone / depth range / distribution range Ecology

Reef-associated; depth range 1 - 200 m (Ref. 343).  Tropical; 35°N - 34°S, 29°E - 139°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Indo-Pacific: From East Africa, Japan to Australia and Hawaii.

Length at first maturity / Size / Weight / Age

Maturity: Lm 7.2  range ? - 6.19 cm Max length : 15.0 cm CL male/unsexed; (Ref. 343); 12 cm CL (female); max. published weight: 900.00 g (Ref. 343); max. published weight: 900.00 g

Short description Morphology

Carapace very elongate, much longer than broad; anterior part much broader than narrow, posterior waist-like. Abdomen clearly visible from dorsal view. Chelae greatly outsized in males; chelae and legs laterally flattened, spade-like. Color: orange to red overall.

Biology     Glossary (e.g. epibenthic)

Minimum depth from Ref. 114541. Occupies the sublittoral zone (Ref. 77016). Occurs at depths greater than 100 m in open sandy areas (Ref. 343) in which they bury (Ref. 106934). Feeds on a variety of worms and soft shelled mollusks (Ref. 343). Members of the order Decapoda are mostly gonochoric. Mating behavior: Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer (Ref. 833).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Members of the order Decapoda are mostly gonochoric. Mating behavior: Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer.

Main reference References | Coordinator | Collaborators

Ng, P.K.L. 1998. (Ref. 343)

IUCN Red List Status (Ref. 119314)

  Not Evaluated 

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses

Fisheries: commercial
| FishSource | Sea Around Us

Internet sources

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | GenBank (genome, nucleotide) | GloBI | | Google Books | Google Scholar | Google | ispecies | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 18.2 - 28.8, mean 27.4 (based on 1084 cells).
Resilience (Ref. 69278)
 High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Vulnerability (Ref. 71543)
 Low vulnerability (10 of 100)
Prior r = 0.92, 95% CL = 0.77 - 1.08, Based on 2 stock assessments.
Price category (Ref. 80766)
 Unknown