Colour Variation of an Individual of Hart’s Rivulus (Rivulus hartii) found in a Habitat Rich in Polycyclic Aromatic Hydrocarbons in the Pitch Lake of Trinidad

Typical coloured Rivulus hartii have been documented in South America and the twin island state of Trinidad and Tobago in habitats ranging from rock pools to slow moving streams. After repeated sampling at the Pitch Lake, an area rich in polycyclic aromatic hydrocarbons in Trinidad, a single individual was found within a pool of the lake with abnormal colouration. The fish exhibited normal behavior and showed no signs of pathology.