§ Mr. Hoy
Controlled experiments on the effect of detergents and emulsifiers have been made only on shellfish at the Ministry's Fisheries Laboratory at Burnham-on-Crouch, but observations have also been made to determine the effects of these chemicals on both fish and shellfish following oil spills in the Medway and Poole Harbour. The particular emulsifier now being used has not been tested, but it is similar in composition to some of those which have been tested, and all the chemicals showed broadly comparable toxicities.
Although these chemicals are highly toxic, the risk to fish in the open sea is very small because of the enormous dilution that occurs. In estuaries and other places where dilution and dispersal is less, care must be taken in the use of the chemicals, particularly as regards shellfish which cannot move away from the contaminated area.