Freshwater Shrimp

Freshwater shrimp — taxonomically prawns of the Macrobrachium genus, though marketed as shrimp in most English-speaking regions — belong to South and Southeast Asian rivers and are a cornerstone of Bengali, Thai, and coastal Indian cooking. The giant freshwater prawn (Macrobrachium rosenbergii) dominates commercial production and tables alike: its meat carries a cleaner, milder sweetness than marine shrimp, and its softer shell is routinely left on during cooking to protect the delicate flesh and add body to sauces. What sets freshwater shrimp apart in the kitchen is the roe — a prized element in Bengali cuisine that runs orange to black depending on the variety and species. In the hands of a skilled cook, that roe is not an afterthought but a finishing element, cooked separately in ghee and swirled into curries to distribute its rich, briny flavor without going gritty. Smaller wild species like M. malcomsonii and Himalayan river shrimp carry more concentrated flavor in their diminutive forms and are seasonal treasures worth seeking out.

Unlike their marine cousins, freshwater shrimp deteriorate quickly once dead; the softer shell offers less protection, and bacterial activity accelerates. This means live purchase or same-day use is essential for the best results. In landlocked markets where fresh are unavailable, frozen specimens with heads and shells intact represent the best quality substitute. The cooking behavior differs too: freshwater shrimp require less time than marine varieties and turn rubbery fast — a hot curry or sauce for two to three minutes is sufficient. The yield runs roughly 60–70% meat by weight after peeling, and for most South Asian preparations, peeling is optional rather than default.