High Pressure Processing (Seafood)

High pressure processing (HPP) exposes sealed, packaged seafood to extreme hydrostatic pressure, typically 400-600 MPa, several thousand times normal atmospheric pressure, for a few minutes, inactivating most vegetative bacteria, yeasts, and molds through physical disruption of cell membranes without the heat that would cook the product, letting processors extend shelf life and improve food safety while keeping a raw or near-raw sensory profile that heat pasteurization would destroy. The technology has found a particularly strong niche in crab and lobster meat extraction, since the pressure treatment loosens the connective tissue holding meat to shell nearly as effectively as cooking does, letting processors extract whole, intact meat pieces from raw shellfish without boiling, a meaningful yield and quality improvement over traditional cooked extraction methods. HPP does not inactivate bacterial spores (which survive pressures far beyond what HPP equipment applies) or most viruses, so it is positioned as a pathogen-reduction and shelf-life-extension tool layered on top of, not a replacement for, proper cold chain management and good manufacturing practice. Oysters treated with HPP for Vibrio vulnificus and Vibrio parahaemolyticus reduction represent another significant commercial application, since the treatment can achieve substantial pathogen log-reduction in the raw, half-shell product form consumers specifically want to buy.