A brief immunological resume of each of the marine toxins is reviewed in this report. These toxins are brevetoxin (PbTx), palytoxin (PTX), okadaic acid (OA), paralytic shellfish toxins (PSP) and ciguatoxin (CTX). The immunological and biotechnical procedures developed for each of these toxins are reviewed. The cross‐reactivity of the polyether‐type toxins (PbTx, OA and CTX) are discussed. The capabilities of immunological technology for assessment of toxins in seafood products appears promising and will probably be widely used in the seafood industries.