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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: 35 — same: 3, differ: 5, only one side holds a record: 19, neither holds one: 6, each has its own: 2.

Field	First Metapenaeus affinis HWT-SHRIMP-0007	Second Metapenaeus monoceros HWT-SHRIMP-0002	Comparison
Plate	© Laura Flamme; MNHN, CC BY 4.0, via Wikimedia Commons · CC BY 4.0	© Chan T. Y. & Lin C. W.; MNHN, CC BY 4.0, via Wikimedia Commons · CC BY 4.0	Each has its own
Stable identifier	HWT-SHRIMP-0007	HWT-SHRIMP-0002	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.	speckled 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	Metapenaeus monoceros is the second most abundant commercially important shrimp species caught along the Saudi Arabian Red Sea coast … fishery-independent samples collected from shrimp trawling grounds off Al Qunfudhah and Jizan (October 2022–September 2023). Altogether, 10,859 specimens were examined. Saudi territorial waters, Red Sea Reference 12 — Abstract · verified the evidence is a rendering of what the locator holds, not a verbatim quotation According to the FAO sheet (1983): occurs throughout the area from South Africa to south India, including the Red Sea, Madagascar, Mauritius, La Réunion and Sri Lanka, but is “absent from the Gulf”; further east as far as the Malay Peninsula; it has entered the eastern Mediterranean through the Suez Canal. A regional statement; no range on the Saudi Gulf coast is attributed to the species. Reference 110 — Metapenaeus monoceros 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): almost the entire body is pubescent (in East Africa, except the Red Sea, the pubescence is restricted to the dorsal part of the carapace and abdominal patches); rostrum with 9 to 12 teeth along the entire dorsal margin, straight, reaching as far as or beyond the tip of the antennular peduncle; telson armed only with spinules; a small ischial spine on the first pereopod. Colour: body pink, green-greyish or whitish with brown specks; antennae red. A description for the western Indian Ocean (FAO Area 51), not a Saudi study. Reference 110 — Metapenaeus monoceros 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): usually found from the coast to about 70 m (fished down to 170 m in an exploratory survey off Pakistan), mainly on mud, sandy-mud or silt; juveniles live in estuaries and backwaters or close to the shore. A description for the western Indian Ocean (FAO Area 51), not a Saudi study. Reference 110 — Metapenaeus monoceros 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
Carapace length (observed range)	The register holds no row for this field.	7.98 – 49.1 mm Saudi territorial waters, Red Sea Reference 12 — Table 1 (Results 3.1–3.2) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 7.98 – 49.1 mm Saudi territorial waters, Red Sea Reference 12 — Table 1 (Results 3.1–3.2) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 8.4 – 37.56 mm Saudi territorial waters, Red Sea Reference 12 — Table 1 (Results 3.1–3.2) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Body weight	The register holds no row for this field.	0.41 – 41.28 g Saudi territorial waters, Red Sea Reference 12 — Table 1 (Results 3.1–3.2) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 0.41 – 41.28 g Saudi territorial waters, Red Sea Reference 12 — Table 1 (Results 3.1–3.2) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 0.46 – 25.88 g Saudi territorial waters, Red Sea Reference 12 — Table 1 (Results 3.1–3.2) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Asymptotic length (L∞)	The register holds no row for this field.	50.66 mm Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 38.97 mm Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Growth coefficient (K)	The register holds no row for this field.	0.35 /yr Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 0.55 /yr Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Total mortality (Z)	The register holds no row for this field.	2.38 /yr Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 3.65 /yr Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Natural mortality (M)	The register holds no row for this field.	0.96 /yr Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 1.45 /yr Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Fishing mortality (F)	The register holds no row for this field.	1.42 /yr Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation 2.2 /yr Saudi territorial waters, Red Sea Reference 12 — Results 3.5 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Exploitation rate (E)	The register holds no row for this field.	0.6 Saudi territorial waters, Red Sea Reference 12 — Results 3.6 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Size at first maturity	The register holds no row for this field.	21.12 mm Saudi territorial waters, Red Sea Reference 12 — Results 3.3 (95% CI 20.91–21.29 mm) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Spawning potential ratio	The register holds no row for this field.	0.23 Saudi territorial waters, Red Sea Reference 12 — Results 3.6; Figure 6 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Sex ratio	The register holds no row for this field.	1.56 females to 1 male Saudi territorial waters, Red Sea Reference 12 — Results 3.3 · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Spawning period	The register holds no row for this field.	Continuous year-round with a February to May peak Saudi territorial waters, Red Sea Reference 12 — Discussion (peak February–May) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Recruitment period	The register holds no row for this field.	Young individuals abundant from June to September Saudi territorial waters, Red Sea Reference 12 — Discussion (June–September) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
Codend mesh size	The register holds no row for this field.	40 mm Saudi territorial waters, Red Sea Reference 12 — Methods 2.1–2.2 (38 mm regulated minimum) · verified the evidence is a rendering of what the locator holds, not a verbatim quotation	Only the second has a record
General description	The register holds no row for this field.	Maximum total length (TL) printed by the FAO sheet (1983): males 15 cm, females 20 cm. It is a maximum recorded total length, not a common size and not a measurement made in Saudi waters; the Saudi measurements on this page are carapace lengths and are shown separately. Reference 110 — Metapenaeus monoceros 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.	10859 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.	10 % 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 12 — Life History Traits and Fishery Dynamics of Speckled Shrimp, Metapenaeus monoceros (Fabricius, 1798), Along the Saudi Arabian Red Sea Coast, 2025 Reference 14 — World Register of Marine Species, 2026 Reference 15 — ASFIS List of Species for Fishery Statistics Purposes, 2026 edition, 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.