18 appearances (over 36 pages)
from issue no. 1 (24/09/77) to no. 18 (21/01/78).
All were printed in black and white.

Sea Urchin is a merboy who lives under the sea. Silas Sharke - 'The Underwater Rotter' (who appears to be a merman himself) - wants to make his fortune by capturing him. Each week he tries and each week he fails - dismally.