matter are shown in fig1 8 wherein similar features share common reference numerals the term u201c fish u201d refers to experimental fish used in a laboratory setting which include but are not limited to zebrafish these fish typically belong to but are not limited to the taxa group telostei or teleostomi the teleost fish include such fish as zebrafish danio rerio medaka oryzias sp fathead minnow pinephales promelas or goldfish carassius auratus it is well established that fish have a typical response to electrical fields applied in the water although each individual fish and each type of species may have a varying response the term u201c tank u201d is generally known to those in the arts as a water tank the preferred embodiment being a 10 40 gallon tank used by researchers that customarily sets on a laboratory top tank can also include larger tanks including outdoor tanks and naturally occurring ponds and streams also the characteristics of the water should not be limited to freshwater but may also include water of differing salinities including sea water the term u201c electrical stimulation u201d refers to an electrical field impressed on the tissue of a fish in water this electrical field will have a range in values that is dependent on the age and species of the fish the term u201c programmable voltage supply u201d shall mean a device that can output a range of voltages and currents in a waveform that is programmed either by hardwire switch e g a pulse generator or by software e g a computer controlled voltage generator now referring to fig1 a system 100 is shown for the anesthetizing fish the system 100 has a water tank 110 two electrodes 120 u2032 120 u2033 immersed in the water tank.