I've been to Palau 8 times. You had a bad week, there is no Shark finning in Palau. If they do catch a trawler like they did about 5 years ago they seize the boat and burn the fins. They are pretty good at patrolling their waters.
If you were expecting clouds of fish....no not really you will see many large schools of fish like Fusiliers, Moorish idols, Jacks etc. (But not like Raja Ampat that is where you can see clouds of fish....but not many sharks as finning years ago pretty much cleaned them out). Did you go up to Devil fish city? there are always Mantas there. I've seen many mantas throughout the area when I go in Feb or March. The Manta mating season is in October and first part of November....Robint saw many last year in the German Channel...and I have not been that lucky! In the times I have been there I have only seen about 5 or 6 species of sharks but mostly Grey's, Leopard and White tips....I've been there when people have seen Hammerheads and Tigers...I have not been that lucky!!!
I'd say you had a bad week.
I just got back from one week on Palau Aggressor and one week at Manta Ray Bay resort on Yap. I had no complaints about the diversity or density of marine life at Palau. We saw huge schools of a variety of fish at Blue Corner and Peleilu Corner. The coral in German Coral Gardens was terrific. I have no complaints about Palau.
Yap is not as high on my satisfaction chart.
And Scott? Sea sickness is Divine Retribution for divers who dive too much. :kiss2:
Art