No Jeff, they don't look any different.Even in snows thre are so many shades etc....you get pinks,greens,yellows and all shades of whites etc,etc......
The only way you know for sure you have a pearl is to produce it by useing two animals that are already hypo ( or ghost) then there is no question at all and it could look like every other snow out there.
I have produced a couple and if I dropped them in a bucket with some snows there is no way you would ever know what is what.
Same goes with the hybinos dude.They should be a pale looking amel but I have some that are so bright you would never guess they where indeed hybinos.
Here is a pair of pearls I produced in (09) and I just saw one of them the other day and now its a adult and loks no different than some of my snows.
L8r Shannon

here are two sibling hybinos and if the parents wouldn't have both been hypo I wouldn't have guessed them to be hybinos.

Now when the extreme gene is used I do think that they look different.Like the triple that Don Produced with the extreme line it does have that real pale look and calling it a opal is perfect cause its still a pearl but has the kicker affect with the hypo gene being extreme or Mega.
I have a extreme hybino that Don produced and it looks just like it should with the extreme hypo gene in play.
Here she is and you can se how pale she is because of the extreme gene being expressed.

here is another hybino I produced with the hobby hypo gene and like I said above in a bucket of amels this would probably be the last one I would guess to be a actual hybino.

here is another visual hybino I produced and again you can see it has all kinds of tipping and I wouldn't guess it to be a hybino but it is 100% hypo and amel.

one more just for fun.This hansome dude is also 100% hybino and wouldn't exactly fit the "LOOK" of a hybino as most people would think.

Getting back to the pearls (triple homos) or opals (triple homo with extreme or mega gene expressed) here are two snows that I produced years ago from triple het x triple het breedings and at the time they where possible pearls.Well, I grew them up and test bred them to find out that they where both het hypo but neither one was a actual triple homo.Look at the yellow expressed one the one.By Jeff's theory one would think its a pearl for sure right?NOT!!!!!!!


And here is one of the pearls I produced in (09) and now she is about breeder size.

So anyway, Hate to rain on your parade Jeff but you can't tell a hybino or pearl from a albino or a snow unless you have test bred or produced it with hypo parents.
L8r Shannon