They seem to indicate that there are abrasions on the whale as if it had been struck. Regardless, these were kept in a relatively small tank. Read my post earlier on my visit to this aquarium........timely.
Very sad. I'm glad the Georgia Aquarium did all they could to try and revitalize the beluga. ... Unfortunately this is something all too common. While they are beautiful to see, I have a hard time getting behind the idea of keeping whales in captivity. They just don't do well... so many die. Sometimes it is improper housing (like building a tank under a coaster) or sometimes it is human stupidity like a lethal injection by a vet not licensed to practice in the state (see Shed, 1992). It is very sad.
I know, I've done quite a bit of research on that. That's one reason I didn't post any links, lest they be slanted. People can research for themselves. The point I was trying to make was that humans made a mistake and whales died. Happens too often with whales, IMHO, and makes me sad.
Actually I believe the drug and dosage used had been successfully used in that species prior to the incident, and that it is still a mystery as to why it would have killed these two whales.
"Six years later, Boehm has been exonerated of any error in the deaths of the two beluga whales. According to investigators, the good doctor did everything by the book. Why the medicine, long used on captive belugas, killed these two will likely never be known. But levamisol is no longer used on marine mammals because of the deaths."