Each ottava rima stanza in English consists of 8 iambic lines, usually iambic pentameters. The rhyming scheme for each stanza is a-b-a-b-a-b-c-c. The form is similar to the older Sicilian octave, but evolved separately and is unrelated.
Down under the sea it's frolic time free. Fiddler crabs play jigs, lolling, lively lilts. Cockles flap up to clang their symbols with glee. Angelfish, halos askew, sing in kilts. Octopuses play jazz in harmony. Shrimps a dancing, rocking attune on stilts. Anemones tentacles wave in surge, as tide and current roll rhythms and submerge.