What talent does Fathom discover that he has in the opening chapter of the novel, Darkstalker?

In Chapter One, Fathom and seven other SeWing dragonets are lined up on the beach for a test. Queen Lagoon and Albatross, second in power to the queen, arrive to test the dragonets for animus magic. Albatross uses his magic to drop coconuts in front of each dragonet. Then he tells them to tell their coconuts to fly over and hit him. The dragonets try, but nothing happens. Fathom politely tells his to fly, but nothing happens. The dragonet Indigo tells him to order the coconut. He does and discovers that he has animus magic when the coconut flies to Albatross and hits him in the chest.