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Compare two species

Two published records side by side, field by field. Each row says in words whether the two sides are the same, differ, or only one holds a record, and each empty cell says why it is empty. Only published records appear, and every value carries its reference.

First

Second

Fields side by side

Fields shown: 21 — same: 3, differ: 5, only one side holds a record: 5, neither holds one: 6, each has its own: 2.

Field	First Metapenaeus affinis HWT-SHRIMP-0007	Second Penaeus monodon HWT-SHRIMP-0006	Comparison
Plate	© Laura Flamme; MNHN, CC BY 4.0, via Wikimedia Commons · CC BY 4.0	© (c) Afsar Nayakkan, some rights reserved (CC BY), via iNaturalist observation 284214961 · CC BY 4.0	Each has its own
Stable identifier	HWT-SHRIMP-0007	HWT-SHRIMP-0006	Each has its own
Taxonomic rank	Species	Species	Same
Authority and year	(H. Milne Edwards, 1837)	Fabricius, 1798	Differs
English name	The register holds no verified English name for this taxon.	giant tiger prawn black tiger prawn Asian tiger shrimp	Only the second has a record
Nationally approved Arabic name	No nationally approved Arabic name exists for this taxon; verified local names are shown in the next two rows, as what they are.	No nationally approved Arabic name exists for this taxon; verified local names are shown in the next two rows, as what they are.	Neither has a record
Local name — Red Sea A name recorded for this sea; it is not an occurrence record.	No verified local name is recorded for the Red Sea.	No verified local name is recorded for the Red Sea.	Neither has a record
Local name — Arabian Gulf A name recorded for this sea; it is not an occurrence record.	No verified local name is recorded for the Arabian Gulf.	No verified local name is recorded for the Arabian Gulf.	Neither has a record
Family	PENAEIDAE	PENAEIDAE	Same
Order	Decapoda	Decapoda	Same
National code	This record carries no national code.	This record carries no national code.	Neither has a record
Measured specimen length The length of a measured specimen, not the maximum length of the species.	The register holds no measured specimen length.	The register holds no measured specimen length.	Neither has a record
Published conservation status	No conservation assessment is published for this record.	No conservation assessment is published for this record.	Neither has a record
Distribution	Saudi Arabian Gulf coast: preserved specimens held by the Smithsonian National Museum of Natural History (USNM) and published through GBIF, among them Manifa Bay (1982), Oqair Bay (1974), Manifa (1971). The GBIF records give Isabel Pérez Farfante as the determiner. Museum specimen records: not an estimate of abundance and not a statement about the species today. Saudi territorial waters, Arabian Gulf Reference 114 — Occurrence record · verified the evidence is a rendering of what the locator holds, not a verbatim quotation Reference 115 — Occurrence record · verified the evidence is a rendering of what the locator holds, not a verbatim quotation Reference 116 — Occurrence record · verified the evidence is a rendering of what the locator holds, not a verbatim quotation According to the FAO sheet (1983): within the area it occurs in the “Gulf” and the Arabian Sea from the Gulf of Oman to south India, and in Sri Lanka; further east as far as the Philippines and Taiwan Island. A regional statement; the Saudi record of the species is the specimens named above. Reference 110 — Metapenaeus affinis sheet: geographical distribution · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Saudi Red Sea: recorded but rare, 17 individuals (0.02% by number) in the fishery-independent trawl surveys off Jizan and Al Qunfudhah, October 2022 to September 2023. Saudi territorial waters, Red Sea Reference 11 — Results 3.1 · verified According to the FAO sheet (1983): within the area from south and east Africa to the Gulf of Aden and the Red Sea, the west coast of Madagascar, Mauritius and La Réunion, and from Pakistan to south India and Sri Lanka, extending east as far as China and Japan, the Philippines, New Guinea and Australia. A regional statement that does not name Saudi Arabia. Reference 110 — Penaeus (Penaeus) monodon sheet: geographical distribution · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Differs
Morphology	According to the FAO identification sheet (western Indian Ocean, 1983): generally almost the entire body pubescent (rarely partly or completely hairless); rostrum with 8 to 11 teeth along the entire dorsal margin, slightly sinuous; telson armed only with spinules; an ischial spine on the first pereopod. Colour: body pale greenish to pale pinkish, sometimes green-bluish or pink-brownish, with green or red-brown specks; antennae red. A description for the western Indian Ocean (FAO Area 51), not a Saudi study. Reference 110 — Metapenaeus affinis sheet: distinctive characters · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	According to the FAO identification sheet (western Indian Ocean, 1983): carapace smooth; rostrum with 7 or 8 teeth on the dorsal margin and 3 or 4 (rarely 2) on the ventral margin; gastrofrontal crest absent; fifth pereopod without an exopod. Colour: body green-grey to brown, sometimes reddish or bluish; abdomen with dark brown to dark grey and pale yellow dorsal transverse bands; antennae uniform pink-brown. A description for the western Indian Ocean (FAO Area 51), not a Saudi study. Reference 110 — Penaeus (Penaeus) monodon sheet: distinctive characters · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Differs
Habitat and distribution	According to the FAO sheet (1983): found from the coast to depths of about 55 m (occasionally deeper, to 90 m), mainly on mud or sandy-mud; juveniles live in estuaries and backwaters. A description for the western Indian Ocean (FAO Area 51), not a Saudi study. Reference 110 — Metapenaeus affinis sheet: geographical distribution and behaviour · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	According to the FAO sheet (1983): found from the coast to about 150 m, occasionally deeper; the largest concentrations are fished in less than 60 m on mud or sand, sometimes mixed with shell fragments; juveniles are found in mangrove swamps, estuaries or backwaters; more easily available at night. A description for the western Indian Ocean (FAO Area 51), not a Saudi study. Reference 110 — Penaeus (Penaeus) monodon sheet: geographical distribution and behaviour · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Differs
Identity and names	Accepted name in the World Register of Marine Species (WoRMS): Metapenaeus affinis (H. Milne Edwards, 1837), an accepted species in its own right and not a synonym of Metapenaeus monoceros. Reference 14 — AphiaRecordsByName, retrieved 17 October 2026 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	The register holds no row for this field.	Only the first has a record
General description	The register holds no row for this field.	Maximum total length (TL) printed by the FAO sheet (1983): males 26.8 cm, females 33.7 cm; the sheet calls it the largest penaeid known. It is a maximum recorded total length, not a common size and not a measurement made in Saudi waters. Reference 110 — Penaeus (Penaeus) monodon sheet: size · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Study sample count	The register holds no row for this field.	17 Saudi territorial waters, Red Sea Reference 11 — Results 3.1 (species composition, n = 103,758 individuals, shares by number) · verified	Only the second has a record
Share of the study sample	The register holds no row for this field.	0.02 % Saudi territorial waters, Red Sea Reference 11 — Results 3.1 (species composition, n = 103,758 individuals, shares by number) · verified	Only the second has a record
Sources	Reference 14 — World Register of Marine Species, 2026 Reference 110 — FAO Species Identification Sheets for Fishery Purposes: Western Indian Ocean (Fishing Area 51), Penaeidae sheets, 1983 Reference 114 — GBIF occurrence 1322815946: Metapenaeus affinis, Manifa Bay, 1982, specimen of the Smithsonian National Museum of Natural History (USNM), 1982 Reference 115 — GBIF occurrence 1319228461: Metapenaeus affinis, Oqair Bay, 1974, specimen of the Smithsonian National Museum of Natural History (USNM), 1974 Reference 116 — GBIF occurrence 1318200524: Metapenaeus affinis, Manifa, 1971, specimen of the Smithsonian National Museum of Natural History (USNM), 1971	Reference 11 — Linking Biological Parameters to Fishery Management: Stock Assessment of Green Tiger Prawn, Penaeus semisulcatus De Haan, 1844 Along the Red Sea Coast of Saudi Arabia, 2025 Reference 14 — World Register of Marine Species, 2026 Reference 110 — FAO Species Identification Sheets for Fishery Purposes: Western Indian Ocean (Fishing Area 51), Penaeidae sheets, 1983	Differs

An empty cell describes the register, not the animal: it does not mean the value is zero, or that science does not know it. A row carrying a state phrase ("unknown", "not recorded in the source") holds an explicit record saying so. A local name recorded for a sea is not an occurrence record, and a value two records share does not make them one record.

What the words in the comparison column mean

Same: Both sides hold the same value.
Differs: Both sides hold a value, and the two values are not the same.
Only the first / only the second has a record: The other side holds no row in the register for this field, and its cell says why.
Neither has a record: Neither side holds a row for this field.
Each has its own: A field whose two values are not compared: two identifiers, two plates; each record has its own.