Turning off the lights, or covering the eye with a removable "cup" of
some sort might be a good idea, if it is practical with your study
species... I'd be skeptical that blinding the fish chemically or
physically wouldn't lead to many experimental artifacts (behavioral
changes... unless this is what you're after).  A humane method may be
simpler, cost you less in red tape, and... it's humane.
  Best regards,

  Kevin Hovel
  VIMS/School of Marine Science
  College of William and Mary
  Gloucester Point, VA 23062
  (804) 684-7643

On Wed, 14 May 1997, Jimmy H. Waddell wrote:

> Turn off the lights.
>
> Jimmy H. Waddell, Researcher
> Coop Fish Mgt Res Lab
> Southern Illinois Univ
> Carbondale, IL 62901       618-536-7761
>