SpaceX launched thousands of tiny sea creatures to the International Space Station on Thursday, along with a plaque-fighting toothpaste experiment and powerful solar panels.

The 7,300-pound (3,300-kilogram) shipment — which also includes fresh lemons, onions, avocados and cherry tomatoes for the station’s seven astronauts — should arrive Saturday.

SpaceX’s Falcon rocket blasted into the hazy afternoon sky from Kennedy Space Center. The first-stage booster was new for a change, landing on an offshore platform several minutes after liftoff so it can be recycled for a NASA astronaut flight this fall.