PHOTOS | Highlights from Day 1 of the Paralympics
Plenty of swimming in the the top 5 from Rio
Three Canadian swimmers reached finals Thursday, including James Leroux in the men's 100-metre breaststroke SB9.
Ilana Dupont also went through to the final in women's 100 T53
Australia's Lakeisha Patterson, right, embraced fellow countrywoman Maddison Elliott after Patterson won gold in the women's 400 freestyle S8.
Despite a lopsided 75-38 win for the United States, there was plenty of intensity as American Trevon Jenifer, right, and Brazil's Marcos Candido fought for the loose ball.
Here's an underwater shot of Great Britain's Andrew Mullen during the men's 200 freestyle S5 to cap off the top photos from Thursday.