b393capt wrote in
ups.com:

I took some more careful measurements. One of the things I noticed is
that the current I read needs 30 seconds or so to settle down
sometimes (e.g. it reads a higher current at first and then goes
lower), also the analog and digital meters have their strengths so I
used a combination of the two to get better readings last night.


To put the ammeter in series, you had to disconnect the fish,
temporarily, while it was still in the water. This allowed its ion
stream to wash away so when you reconnected it there was a great rush of
new seawater on the surface of the fish, resulting in an inrush of
current you measured. After a few seconds to minutes, the water
surrounding the fish was saturating with zinc ions that had been corroded
off the fish, insulating it some from further galvanic action unless the
seawater was rushing by. So, you saw the current drop as time increased,
which is quite normal. Super accurate readings are useless....here.

Larry
--
Grade School Physics Factoid:
A building cannot freefall into its own footprint without
skilled demolition.