HSN Code 0308 refers to "Aquatic invertebrates other than crustaceans and molluscs, live, fresh, chilled, frozen, dried, salted or in brine, even smoked; flours, meals and pellets of aquatic invertebrates other than crustaceans and molluscs, fit for human consumption." This classification code is essential for identifying various aquatic invertebrates for import/export purposes based on their nature, state, and intended use. Common products under HSN Code 0308 include live sea cucumbers, fresh jellyfish, dried sea urchins, and fish meal made from aquatic invertebrates. Additionally, the GST rate for these aquatic products under this code supports accurate trade compliance.