the yellow light of the torch showed up the minute life of an inshore coral community -- -the pale sea urchins and the fierce black spines of sea eggs , the shifting underbrush of seaweeds , the yellow and blue seeking antennae of a langouste , the butterfly and angel fish , fluttering like moths in the light , a coiled beche de mer , a couple of meandering sea caterpillars and the black and green jelly of a sea hare .