Noun
a powerful neurotoxin produced by certain dinoflagellates found in red tides; it can accumulate in mollusks that feed on the dinoflagellates and cause food poisoning to humans
Source: WordNetShellfish consume the organisms responsible for red tide and concentrate Saxitoxin (produced from these organisms) in their tissues. Source: Internet
Saxitoxin blocks sodium channels and eating contaminated seafood can result in paralysis within 30 minutes. Source: Internet