This was a unique family show from Canada about a marine veterinarian at the Vancouver Aquarium who runs into a ton of ecological criminal activity in nearly every episode. Filmed in Vancouver it had a great outdoorsy look and feel. It was basically an adventure show with light action in most episodes. Wikipedia mentions it as an older children's show, but I always found the plots were more focused on the adults. Donnelly Rhodes was a good Canadian actor who later appeared in Davinci's Inquest, a Canadian cop show, and Susan Walden was his love interest sfter season 1.
This reunion special says it had aired in 72 countries, and they talk of a new episode in production, but I don't believe it ever came to light.
I wouldn't trust wikipedia, as they might not have all info regarding broadcast countries. This Canadian report during the reunion interview says it aired in 72 countries, so you would have thought being an English language show, it would have aired in the UK. But as jno said, who knows.
I know in the USA in the 90s, it was only airing on the Disney Channel, which was part of paid cable TV. You wouldn't have seen it in the US if you didn't have paid cable, as it never aired anywhere else.