Argentine Red Shrimp, SEFSC Pascagoula Laboratory; Collection of Brandi Noble, NOAA/NMFS/SEFSC., Public domain, via Wikimedia Commons

Argentine Red Shrimp: Everything You Need to Know About Pleoticus muelleri

What is Argentine Red Shrimp?

Argentine Red Shrimp (Pleoticus muelleri) is a crustacean species native to the southwestern Atlantic Ocean, widely distributed along the coasts of Argentina, Uruguay, and Brazil. This species is known for its bright red colour, unique flavour, and succulent texture, which has garnered significant commercial interest. As demand for Argentine Red Shrimp increases globally, a deeper understanding of its biology, ecology, and conservation needs is essential to ensure long-term sustainability.

Distribution and Habitat

The Argentine Red Shrimp is found in the southwestern Atlantic Ocean, with a range extending from southern Brazil to northern Patagonia in Argentina. These shrimp typically prefer cold-temperate waters, ranging from 6 to 14°C. They inhabit depths between 40 and 200 meters, preferring soft, muddy-sandy substrates. Their distribution is influenced by temperature, salinity, and oceanographic conditions.

Biology and Life Cycle

Argentine Red Shrimp are decapod crustaceans with a life span of approximately 3-4 years. They exhibit sexual dimorphism, with females growing larger and living longer than males. The species has a complex life cycle, undergoing several stages of development:

  • Embryonic stage: The female carries fertilized eggs until they hatch into larvae.
  • Larval stage: The shrimp progress through multiple larval stages, called nauplius, protozoea, and mysis, before reaching the postlarval stage.
  • Juvenile stage: Postlarvae develop into juveniles, which continue to moult and grow until reaching maturity.
  • Adult stage: Mature shrimp breed and reproduce, completing the life cycle.

Ecology and Feeding Habits

Argentine Red Shrimp are omnivorous, feeding on a diverse diet that includes phytoplankton, zooplankton, and detritus. They serve as a primary food source for several marine species, such as fish and cephalopods, while also contributing to the nutrient cycling in their environment. They play a crucial role in their ecosystem, functioning as predator and prey.

Commercial Significance

The Argentine Red Shrimp fishery has experienced substantial growth in recent years due to increasing global demand. The species is caught as targeted catch and as bycatch in fisheries targeting other species. The primary fishing methods include bottom trawling and double-rig trawling. The shrimp are primarily exported as frozen products, with the United States, Spain, and China being major importers.

Challenges and Threats

Despite its commercial importance, the Argentine Red Shrimp faces several challenges:


Unsustainable fishing practices and insufficient regulation have led to concerns about the long-term viability of the species.

Climate change: 

Rising sea temperatures and changes in oceanographic conditions may alter the shrimp’s distribution, abundance, and reproductive success.

Habitat degradation: 

Bottom trawling can damage benthic habitats, affecting the shrimp’s ability to find shelter and food.

Conservation and Management

Efforts to conserve and manage the Argentine Red Shrimp include:

  • Implementing science-based catch limits and quotas to prevent overfishing.
  • Establishing Marine Protected Areas (MPAs) to safeguard critical habitats and promote population recovery.
  • Promoting selective fishing gear to minimize bycatch and reduce habitat damage.
  • Conducting regular stock assessments to monitor the health and abundance of the shrimp population.
  • Encouraging international cooperation and coordination among various countries to develop and implement comprehensive management plans.
  • Raising public awareness about the ecological importance and conservation needs of Argentine Red Shrimp to foster responsible consumer choices.

How to Cook Argentine Red Shrimp

Argentine Red Shrimp is a versatile seafood option that can be prepared using various cooking methods. The unique flavour and succulent texture make it a delicious addition to numerous dishes. Here are a few ways to cook Argentine Red Shrimp:

How to Grill Argentine Red Shrimp: 

Skewer the shrimp and grill them over medium-high heat for 2-3 minutes per side until they are opaque and cooked. Season the shrimp with olive oil, minced garlic, salt, pepper, and a squeeze of lemon juice. Serve with a side of chimichurri sauce for an authentic Argentine touch.

How to Pan-Sear Argentine Red Shrimp:

Heat olive oil or butter in a skillet over medium heat. Add peeled and deveined shrimp seasoned with salt, pepper, and your choice of spices or herbs. Cook for 2 minutes per side or until the shrimp turns opaque and pinkish-red. Finish with a squeeze of lemon juice and serve over pasta, rice, or a salad.

Argentine Red Shrimp Scampi:

Sauté minced garlic in olive oil or butter until fragrant. Add the shrimp, white wine, lemon juice, salt, and red pepper flakes. Cook the shrimp for 2-3 minutes per side or until cooked through. Finish with chopped parsley and serve over pasta, rice, or crusty bread.

How to Bake Argentine Red Shrimp:

Preheat your oven to 400°F (200°C). Arrange the shrimp in a single layer on a baking sheet, and season with salt, pepper, and your choice of spices or herbs. Drizzle with olive oil and bake for 8-10 minutes or until the shrimp is cooked through and opaque. Serve with a side of roasted vegetables or a fresh salad.

How to Stir-Fry Argentine Red Shrimp:

In a wok or large skillet, heat oil over high heat. Add your choice of vegetables (e.g., bell peppers, onions, broccoli, or snap peas) and stir-fry for a few minutes. Add the shrimp and your preferred stir-fry sauce (e.g., soy sauce, oyster sauce, or a spicy chili sauce) and cook for an additional 3-4 minutes, or until the shrimp is cooked through. Serve over steamed rice or noodles.

How to Boil Argentine Red Shrimp:

Boiling is a simple and effective method for cooking Argentine Red Shrimp. The boiling time will depend on the size of the shrimp and whether they are fresh or frozen. Here are the general guidelines for boiling Argentine Red Shrimp:

How Long to Boil Fresh or Thawed Shrimp:

  • Small to medium-sized shrimp: 2-3 minutes
  • Large shrimp: 3-4 minutes
  • Extra-large or jumbo shrimp: 4-5 minutes

How Long to Boil Frozen Shrimp:

  • Small to medium-sized shrimp: 4-5 minutes
  • Large shrimp: 5-6 minutes
  • Extra-large or jumbo shrimp: 6-7 minutes

To boil the shrimp, follow these steps:

  1. Fill a large pot with water and add salt to taste. You can also add other seasonings or aromatics, such as lemon wedges, bay leaves, or Old Bay seasoning, for additional flavour.
  2. Bring the water to a rolling boil.
  3. Carefully add the shrimp to the boiling water and cook for the recommended time based on their size and freshness (see guidelines above). The shrimp should turn pink and opaque when they are fully cooked.
  4. Remove the shrimp from the boiling water using a slotted spoon or a colander, and immediately transfer them to a bowl of ice water to stop the cooking process and maintain their texture.
  5. Once the shrimp have cooled, drain them and serve as desired, or peel and devein them if necessary.

Remember that overcooked shrimp can become tough and rubbery, so monitoring their colour and texture closely during the boiling process is essential.

These are just a few examples of how Argentine Red Shrimp can be prepared. Its versatile nature allows for experimentation with various flavours and cooking techniques, making it a delicious and adaptable addition to your culinary repertoire.


Argentine Red Shrimp is an ecologically and economically significant species, vital in the southwestern Atlantic Ocean ecosystem. As the global demand for this seafood delicacy continues to grow, it is crucial to develop and implement science-based management strategies to ensure the long-term sustainability of the species. These efforts should encompass improved fishing practices, habitat protection, and international collaboration to safeguard the future of Argentine Red Shrimp and the ecosystems they inhabit.

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