Subj : Re: Tropical fish campaig To : All From : T Date : Tue Dec 23 2003 06:27 am I suppose i best sell my glass aquariums and purchase larger rubbermaid containers... Just so the fish can not see thier refelctions... Actually I have had fish that seemingly enjoyed thier own reflections, tinfoil barbs are rather vain ... Tim.. "Jordi Casamitjana" wrote in message news:60659087.0312200412.79bcb9a5@posting.google.com... > > Interesting article. Although, personally, I wouldn't go as far as calling > > my fish "sentient"... > > How would you define "sentient". Do not you think that fish have > senses and brain? > > > > One thing that repeatedly comes up in the article is how the fish can > > "see its reflection in the tank's front glass." That appears to be impossible > > to me: the fish look right through the glass from the inside, just as we > > look right through the glass from the outside. Any reflection would be > > very faint and almost invisible because, at an angle of close to 90 degrees, > > glass reflects very little light. > > > > The ability to see areflection from inside a tank depends on two > things: to have eyes with a brain to interpret images, and that there > is more light inside the tank than outside the tank. Both occurrences > are common in the case of fish and aquaria. > > If you can see the reflection of the fish in the tank walls, then the > chances are the fish can also see it. > > > Regarding you 90 degrees explanation, you seem to live in a different > universe than mine (forgive me the sarcastic tone). In my universe, I > only can see my reflection in a mirrow if it is placed at 90 degrees > from my eyesight. > > It is different when you a trying to see your own reflection through a > galss that has a light in the other side shining towards you. If you > then move away from the light you will see more reflections in the > glass, but not yours. > > In the case of fish, because in most occasions the light inside the > tank is more intense than the one outside, reflectiins inside will > occur. But when you turn the tank lights off, then the reflection > ceases. > > > > I do feel sorry for the thousands of poor bettas though. Being forced > > to hang motionless in a few cubic inches of water is cruelty in my book. > > (And having kept bettas before, I know that they like to swim around > > a lot if they have the room to do so...) > > > I agree with you there. --- þ RIMEGate(tm)/RGXPost V1.14 at BBSWORLD * Info@bbsworld.com --- * RIMEGate(tm)V10.2áÿ* RelayNet(tm) NNTP Gateway * MoonDog BBS * RgateImp.MoonDog.BBS at 12/23/03 6:27:18 AM * Origin: MoonDog BBS, Brooklyn,NY, 718 692-2498, 1:278/230 (1:278/230) .