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GB/T 20556-2026: Swimming crab
Status: Valid
GB/T 20556: Evolution and historical versions
| Std ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status |
| GB/T 20556-2026 | English | 219 |
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Swimming crab
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| GB 20556-2006 | English | 329 |
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[GB/T 20556-2006] Swimming crab
| Valid |
Standard similar to GB/T 20556-2026 SC/T 4030 | GB 5009.261 | GB/T 20554 | GB/T 20552 | Basic data | Standard ID | GB/T 20556-2026 (GB/T20556-2026) | | Description (Translated English) | Swimming crab | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B51 | | Classification of International Standard | 65.150 | | Word Count Estimation | 10,189 | | Date of Issue | 2026-02-27 | | Date of Implementation | 2026-09-01 | | Older Standard (superseded by this standard) | GB/T 20556-2006 | | Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China | GB/T 20556-2026: Swimming crab---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 65.150
CCSB51
National Standards of the People's Republic of China
Replaces GB/T 20556-2006
Three-spotted swimming crab
Published on 2026-02-27
Implemented on 2026-09-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document replaces GB/T 20556-2006 "Portunus trituberculatus". Compared with GB/T 20556-2006, the main differences are structural adjustments and editorial changes.
Aside from the modifications, the main technical changes are as follows.
a) The "classification status" has been changed (see 4.2, 3.2 in the.2006 edition);
b) The section on "Distribution and Ecological Habits" (see Chapter 4 of the.2006 edition) has been removed;
c) The external morphology description has been changed (see 5.1,.2006 edition 5.1);
d) The measurable characteristics have been modified (see 5.3,.2006 version 5.3), and corresponding detection methods have been added (see 8.1.3);
e) The wording for “growth” has been changed (see 6.1,.2006 edition of 6.1);
f) The content regarding egg production has been removed, and the range for the number of eggs carried has been expanded (see 6.2.3, 6.2.4 in the.2006 edition);
g) Breeding water temperature has been removed (see 6.2.5 in the.2006 edition);
h) The section on "Biochemical and Genetic Characteristics" (see Chapter 7 of the.2006 edition) and the corresponding detection methods (see 9.2 of the.2006 edition) have been deleted;
i) The "Molecular Genetic Characteristics" section has been revised (see Chapter 7, Chapter 8 in the.2006 edition), and corresponding detection methods have been added (see 8.3);
j) Methods for detecting key morphological and structural features and growth and reproductive characteristics have been added (see 8.1 and 8.2);
k) The “Judgment Rules” have been changed (see Chapter 9, Chapter 10 in the.2006 edition).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the Ministry of Agriculture and Rural Affairs of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee on Fisheries Standardization (SAC/TC156).
This document was drafted by. Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Lianyungang Ganyu Jiaxin Aquatic Products Development Co., Ltd.; Qingdao
Excellence Ocean Group Co., Ltd., Zhejiang Ocean University, and South China Sea Fisheries Research Institute of Chinese Academy of Fishery Sciences.
The main drafters of this document are. Lu Xiaoping, Gao Baoquan, Wang Wenjun, Zhang Yan, Zhang Hao, Zhang Qingqi, Chen Siqing, Liang Zhourui, Liu Yunfeng, and Chen Shibao.
Zhang Xiumei and Xiao Yayuan.
The release history of this document and the document it replaces is as follows.
---First published in.2006 as GB 20556-2006, it was changed from a mandatory standard to a recommended standard in.2017;
---This is the first revision.
Three-spotted swimming crab
1 Scope
The study describes the structural characteristics, growth and reproduction features, molecular genetic characteristics, and judgment rules, and outlines the corresponding detection methods.
This document applies to the germplasm identification and testing of the swimming crab (Portunus trituberculatus).
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 22213 Aquaculture Terminology
3 Terms and Definitions
The terms and definitions defined in GB/T 22213 and the following terms and definitions apply to this document.
3.1
Full carapacewidth
The straight-line distance between the tips of the spines on both sides of the cephalothorax.
3.2
Carapacewidth
The straight-line distance between the anterior margins of the spine bases on both sides of the cephalothorax.
3.3
Carapacelength
The straight-line distance from the center of the anterior margin of the frontal region of the cephalothorax to the center of the posterior margin of the cephalothorax.
4.Scientific name and classification
4.1 Scientific name
4.2 Classification Status
Phylum Arthropoda, Class Malacostraca, Order Decapoda, Family Portunidae, [unclear text - possibly related to crabs or molluscs]
The genus *Portunus*.
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