The spacecraft, on its 16th mission for NASA under the agency's Commercial Resupply Services contract, lifted off to the ISS at 1.16 p.m. EST on Wednesday on a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida.
Elon Musk tweeted 'Grid fin hydraulic pump stalled, so Falcon landed just out to sea'.
The us space Agency NASA on the day (from 4 to 5 December) was postponed sending the Dragon with food supplies for the global space station. So, despite the splashdown, you could still call it a pretty good day for the space company. If all goes well, the spacecraft will catch up with the station early Saturday morning.
But the primary goal of Wednesday's mission was to deliver the Dragon cargo ship to the proper orbit.
SpaceX attempted to recovered the reusable first stage of Falcon 9 on land but it lost control and made a water landing in Atlantic Ocean about eight minutes after the liftoff.
"Appears to be undamaged & is transmitting data".
The launch was delayed a day when NASA discovered that the food for the mouse-tronauts was moldy.
Experiments onboard the SpaceX Dragon capsule include studies on wound healing in space, as well as two studies by students inspired by Marvel's "Guardians of the Galaxy" will also launch to the orbiting laboratory.
Some 5,600 pounds (2,500 kilograms) of food, experiments and other gear is packed onto the unmanned Dragon cargo ship, which will blast off on a Falcon 9 rocket from Cape Canaveral, Florida. The company's most recent Falcon 9 first stage landing failure was in June 2016. They're away from their families and friends for months on end, don't have access to numerous basic creature comforts we all enjoy, and live on a somewhat limited selection of food... unless, of course, it's Christmas.
Christmas wouldn't be Christmas without the tradition dinner, even in space.
When the Dragon arrives, it will join five other spacecraft already at the station. The newest residents will remain on board for six months, while the others will return to Earth on December 20.
The Dragon space capsule that flew on Wednesday was used once before, on a supply mission in February 2017.