Some good tales in issue 255 of the venerable SF magazine, and no real duds. I really liked Thana Niveau's 'The Calling of Night's Ocean', about a researcher trying to communicate with a dolphin and the unexpected consequences when this is achieved, and 'Mind the Gap' by Jennifer Dornan-Fish, also a story about communication with an AI given consciousness by use of an artificial sensorium but still unsure whether it is truly conscious. 'Oubliette' from E. Catherine Toblar is beautifully written but rather opaque of meaning, a small poem of a story. ( )