Unbelievable! Fish tummy size   8/4/06
There's an article in the current issue of AFM where the author states "A fish's stomach is roughly the size of its eye, so it doesn't take much to fill fish up"...(sigh!)  Eric
<... some are this size... but most... much larger... and very distensible to boot/fill! The editors of AFM are not... "fish or science people". BobF>

Color Vision in Fishes
Hi gang,
The question just occurred to me as to whether fish in general and Tangs
of various varieties in particular are color blind. Nothing shows in
your data base. So, to your knowledge has anyone tested for this?
Regards,
Charlie H.
>>>Hi Charlie,
Yes, fish are equipped with both rods and cones, and can see color very well. Some deep water fish can only see in reds and greens - tangs, being surface fish can detect the entire range.
Jim<<<

Can fish hear?
OK so you've turned me into a big time fishaphile (sp?). I've even
started talking to my fish when one day I noticed he jumped when I
clapped my hands. I was pretty far away from the tank and did not intend
to startle him. Do you think he hears my speech? Whether he cares is
another matter...
<Fishes can indeed hear... through a couple of primary mechanisms... a low amplitude, low frequency general "body" sense and a similar ear-bone amplified internal "ear"... Especially some groups of fishes on the latter... the Ostariophysians... Catfishes, Characiforms (e.g. Tetras), Cypriniforms (e.g. minnows, barbs, danios...) have very good hearing... akin to human range... They can hear you. Bob Fenner>
Allyson

Fish Stabilization
Bob, why is it that some fish seem to have fins and/or a body shape that
stabilizes them along two axis, while others appear to have stabilization
along only one axis?
<Mmm, mainly different strategies for locomotion in an environment (water) that is some six hundred times as dense as air...>
It's commonly accepted that the vertical stabilizer on
an airplane is unnecessary in the ideal case, and some plane designs
(stealth fighter) eliminate this element even though it makes the plane less
stable. Birds don't seem to need two-dimensional stabilization, though wing
flapping might serve that purpose. What's going on?
Jeff
<Motion through a dense medium to get food, avoid predation... Bob Fenner>