Bluely

I pursed my lips thoughtfully, then reached out to prod the bluely gleaming chest of the thing with, I suppose, some notion of rolling it off the bed, […]

By now the bluely luminescent slug-gods were close indeed and their coughing calls loud in the darkness, […]

They formed an oval frame, through which the bluely boundless sea rolled […]

The Sussex fishermen call the porpoise 'Bluely'.