Discovery’s Shark Week has made its biggest ratings splash yet in several key ratings categories, including a first-place finish among all networks — broadcast and cable — in men under 50.

The 27th edition of Shark Week (Aug. 10-16) became the most-watched ever for the event in women 18-49 (639,000), women 25-54 (621,000) and adults 25-54 (1.4 million), according to Nielsen’s “live plus same-day” estimates. The women 18-49 total is also the highest ever for any week in Discovery history.

During the seven-day stretch, Discovery had six of the top 10 ad-supported cable originals among adults 18-49, adults 25-54 and men 25-54 and eight of the top 10 among men 18-49.

For the week of Aug. 11-17 (which included the final six nights of the event), Discovery was the No. 1 primetime cable network in adults 18-49 (1.17 million), adults 25-54 (also 1.17 million) and adults 18-34 (540,000). And in men 18-49, its 636,000 made it the No. 1 network on all of television.

Overall, a cume audience of more than 42 million tuned into the network during Shark Week — third best all-time for the event, behind only 2010 and 2013. The average audience during any minute was 2.48 million, according to Nielsen.

The biggest draw during Shark Week was the opening night movie “Shark of Darkness: Wrath of Submarine,” which averaged 3.83 million viewers, including 2.38 million adults 18-49. It ranks as the No. 1 non-sports cable telecast of the third quarter in men 18-49 and 25-54.

Also scoring big were Monday’s hourlongs “Monster Hammerhead” (3.45 million; 1.93 million adults 18-49) and “Jaws Strike Back” (3.41 million, including 2 million adults 18-49) and Tuesday’s “Alien Sharks: Return of the Abyss” (3.11 million; 1.82 million adults 18-49) and “Lair of the Mega Shark” (2.78 million; 1.64 million adults 18-49).

The return of Shark Week’s latenight talkshow, “Shark After Dark,” was up 3% from last year and outrated cable competitors including Comedy Central’s “The Daily Show With Jon Stewart,” TBS’ “Conan” and HBO’s “Last Week Tonight With John Oliver.”

Shark Week stood as Discovery Channel’s most social programming event to date. On Facebook, 13 million people had more than 21 million interactions around Shark Week content, a 110% increase from last year’s event. Ten premiere telecasts during Shark Week ranked in the Daily Top 5 on Nielsen’s SocialGuide throughout the week and generated 70 primetime Trending Topics on Twitter over 7 days.

On SharkWeek.com, video streams were up 16% vs. 2013, while page views saw a 76% increase, marking the strongest year ever online.