karlodinium decipiens karlodinium decipiens karlodinium decipiens is a species of unarmored dinoflagellates from the genus karlodinium. it was first isolated from the australian region of the southern ocean, but has a widespread distribution, through the southern ocean to the tasman sea, to the coast of spain. it is large-sized and is characterized by having a helicoidal chloroplast arrangement and a big central nucleus. it is considered potentially ichthyotoxic. karlodinium decipiens scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: myzozoa superclass: dinoflagellata class: dinophyceae order: gymnodiniales family: kareniaceae genus: karlodinium species: k. decipiens binomial name karlodinium decipienssalas & laza-martinez