Blue Delta Crab™Delta del Po · Italia

Guide · Callinectes sapidus

Blue crab in Italy: an invasion, in facts.

The Atlantic blue crab (Callinectes sapidus) is a swimming crab native to the western Atlantic that has become an invasive species in Italy, with its highest pressure in the Po Delta lagoons. It is edible, sweet and delicate, and Italy is learning to turn a problem into food. Every figure below has its source.

The Po Delta at dawn, where the Atlantic blue crab now lives

Key facts

Five facts you can quote.

1949

First Italian record

A female collected at Marina di Grado on 4 October 1949 is the first documented record in Italy and the Mediterranean.

Source [1]
Ballast

How it arrived

Ballast water is considered the most likely introduction vector to Europe.

Source [2]
98–100%

Clam mortality, 2023

ARPAV-ISPRA field survey, October 2023: 98–100% in Sacca del Canarin, 85–99% in Sacca di Scardovari.

Source [3]
1,204 t

Sold in Veneto, 2025

€1.91 million at an average €1.58/kg; about 1,163 t unfit for sale were also disposed of by the Scardovari consortium.

Source [4]
€2.9 M

Public relief

The Italian agriculture ministry (MASAF) allocated relief to affected shellfish farms in 2023.

Source [5]

Kitchen

How Italians cook it.

Boiled in salted water or steamed for about 10–15 minutes, then cleaned of gills and innards. Classic uses: spaghetti, risotto, bisque, fritters and crab burgers. Italian guides: how to cook blue crab and recipes.

Italian guide: granchio bluPo Delta dataProductsCRABBY™ Burger

FAQ

Short answers.

Is the Italian blue crab the same as the Chesapeake blue crab?

Yes, it is the same species, Callinectes sapidus, native to the western Atlantic from Nova Scotia to Argentina and now established in the Mediterranean.

Why is there so much blue crab in the Po Delta?

The species spread fast in the northern Adriatic lagoons. In October 2023 ARPAV and ISPRA estimated clam mortality of 98–100% in the Canarin lagoon and 85–99% in Scardovari.

How much blue crab does Veneto land?

In 2025 Veneto fish markets and the consortium system sold 1,204 tonnes, worth €1.91 million, at an average of €1.58/kg (Veneto Agricoltura).

Sources

References, consulted on 2 November 2026.

  1. Stasolla G., Innocenti G. (2014), BioInvasions Records 3(1): primo record italiano, Marina di Grado 1949www.reabic.net/journals/bir/2014/1/BIR_2014_Stasolla_Innocenti.pdf
  2. Mancinelli G. et al. (2017), Marine Pollution Bulletin: il granchio blu nelle acque dell'Europa meridionaledoi.org/10.1016/j.marpolbul.2017.02.050
  3. ARPAV-ISPRA, relazione sopralluogo ottobre 2023 sul granchio bluwww.arpa.veneto.it/granchio-blu/relazionearpav_ispra__sopralluogo-ott-2023_granchioblu.pdf
  4. Veneto Agricoltura, Osservatorio economico: Il granchio blu in Veneto, dati produttivi 2025www.venetoagricoltura.org/myportal/AVPISP/api/content/download?id=69b3e2d850b140008b28bd14
  5. MASAF, ristori granchio bluwww.masaf.gov.it/ristori-granchioblu
  6. FAO-GFCM, programma di ricerca sui granchi bluwww.fao.org/gfcm/areas-of-work/fisheries/scientific-advice-and-knowledge/management-orient
  7. Commissione europea, DG MARE: A tasty blue accident (2022)oceans-and-fisheries.ec.europa.eu/news/tasty-blue-accident-2022-06-02_en