Phantasma is used for what the disciples believed they saw as Jesus walked on the sea.

The attested use names the alarming appearance the disciples thought they saw while Jesus was walking on the sea.

1. Feared appearance on the sea · dominant

   In Mark 6:49 and Matthew 14:26, the nominative singular neuter form occurs in the disciples' reaction to seeing him walking on the sea; the APB renders their conclusion as "it was a ghost" and "it is a ghost."

   Mark 6:49Matthew 14:26

In the Anselm Project Bible: Across both verses, the APB presents the disciples' conclusion with "ghost,".