Introduction

Organoleptic inspection is a fundamental quality control tool in the seafood industry, ensuring that products reaching consumers are safe, fresh, and of premium quality. It involves assessing the sensory attributes of seafood such as its appearance, odour, texture, and taste to determine freshness and detect signs of spoilage or contamination. These evaluations, performed at various stages from raw material receipt to finished product inspection, form a critical part of Good Manufacturing Practices (GMP) and food safety systems.

Proper temperature control is the cornerstone of maintaining seafood quality. Raw materials must be kept between 0°C to 4°C, with uniform icing at a ratio of one part ice to one-part raw material during transport and reception. Inadequate chilling or poor icing can lead to rapid bacterial growth, histamine formation especially in scombroid fishes and deterioration of texture.

Sensory parameters in organoleptic inspection

Appearance and colour of seafood

The appearance and colour of seafood provide clear indicators of freshness and handling conditions. Fresh cephalopods such as squid, cuttlefish, and octopus should possess a natural sheen and bright pigmentation without being yellow or dull. Fish should exhibit bright, metallic skin with clear eyes, red gills, and transparent mucus, whereas discolouration or milky mucus indicates spoilage. Crustaceans must appear clean, intact, and free from foreign matter, mud, or unpleasant odour.

Odour and texture

Odour and texture are key sensory parameters in organoleptic inspection. Fresh seafood emits a mild, pleasant sea smell, while any off-odour, sour, rancid, or ammonia-like is grounds for immediate rejection, with zero tolerance permitted. Texture should be firm and elastic; soft or mushy flesh indicates decomposition or poor chilling. In cephalopods, the surface slime must be clear and not excessive. Flesh detachment from bones in fish or loose shells in crustaceans are signs of deterioration and require rejection of the lot.

Presence of any foreign or objectionable matter

The presence of any foreign or objectionable matter is an indicator of poor hygiene and inadequate handling. Foreign Vegetable Matter (FVM) or Objectionable Foreign Matter (OFM), such as metal, plastic, sand, mud, or filth, are critical defects with zero tolerance. Similarly, the detection of parasites, filth, or grit indicates insufficient washing or contamination and is strictly not permitted in export-quality seafood.