Hawaiian river shrimp (Macrobrachium grandimanus)
Source-cited species reference: taxonomy from WoRMS, biology from SeaLifeBase, occurrence map from GBIF, conservation from IUCN Red List.
Distribution map plotted from GBIF.org occurrence records; basemap Natural Earth 110m · GBIF records CC0 / CC BY; Natural Earth public domain
Hawaiian river shrimp (Macrobrachium grandimanus) is a marine species in the family Palaemonidae (Arthropoda › Malacostraca › Decapoda), recorded in the World Register of Marine Species as Macrobrachium grandimanus (Randall, 1840) under AphiaID 587240.
- Scientific name
- Macrobrachium grandimanus
- Authority
- (Randall, 1840)
- Family
- Palaemonidae
- Order
- Decapoda
- Habitat zone
- benthic
- Iucn red list
- Least Concern
- Gbif occurrence records
- 81
Classification (WoRMS)
Full classification as recorded by WoRMS: Kingdom: Animalia · Phylum: Arthropoda · Class: Malacostraca · Order: Decapoda · Family: Palaemonidae · Genus: Macrobrachium.
Accepted name: Macrobrachium grandimanus · Authority: (Randall, 1840) · Taxonomic status: accepted · AphiaID: 587240.
Synonyms and superseded combinations recorded for this taxon: Palaemon acutirostris Dana, 1852; Palemon grandimanus Randall, 1840.
Source: World Register of Marine Species (WoRMS) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=587240 (CC BY 4.0). Accessed 2026-09-23.
Biology and life history (SeaLifeBase)
Measured values published by SeaLifeBase for Macrobrachium grandimanus. Only fields the database actually holds for this species are shown; these are database values, not aquarium guidance.
Habitat zone: benthic.
Source: SeaLifeBase species summary (SpecCode 25319) — https://www.sealifebase.se/summary/Macrobrachium-grandimanus.html (CC BY-NC 3.0 — non-commercial use only). Accessed 2026-09-23.
Distribution and occurrence records (GBIF)
81 georeferenced occurrence records for Macrobrachium grandimanus are published through GBIF from 15 countries or marine areas. The map above plots 21 distinct locations from a sample of 81 records, omitting 14 inland records that carry an institution's coordinates rather than a collection site; it shows where the species has been observed and reported, not a modelled range.
Most records by country or area: United States of America (38); French Polynesia (13); Cook Islands (6); Philippines (6); Japan (5); Wallis and Futuna (3); New Caledonia (2); China (1); Fiji (1); South Georgia and the South Sandwich Islands (1); Guatemala (1); Indonesia (1); Tonga (1); Viet Nam (1); Vanuatu (1).
Source: GBIF Occurrence Search (taxonKey 2224757) — https://www.gbif.org/occurrence/search?taxon_key=2224757&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=587240 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-23.
Conservation status (IUCN Red List)
The IUCN Red List assesses Macrobrachium grandimanus (Randall, 1840) as Least Concern (code LC). No trend, population estimate or threat analysis is given here, because none is available from this source without the Red List API; follow the source link for the full assessment, including its date.
Source: IUCN Red List of Threatened Species (taxon 197590) — https://www.iucnredlist.org/species/197590/0; GBIF IUCN Red List category endpoint (taxonKey 2224757) — https://api.gbif.org/v1/species/2224757/iucnRedListCategory. Accessed 2026-09-23.
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