Cellular biology and some specific food poisonings for words today.
Food poisoning that comes from eating fish contaminated with ciguatoxins
Ciguatoxin or CTX
A class of toxic polycyclic polyethers found in fish that cause ciguatera
An organism with complex cells, or a single cell with a complex structures
(entry 245 this year, after mix up to have duplicated word)
Protists constituting the phylum Dinoflagellata, usually considered algae, mostly marine plankton, but also common in freshwater