The lady - Squid, the teacher of the school of the deep, looking at him didn't know what kind of fish he was! From his shape, she named him Trianglefish. When classes began and all the little fish learned to write and read, Trianglefish struggled, no matter how hard he tried. He could only draw little triangles. Yet, he was the only one who could face the danger threatening to close the school forever and send the little fish into the fisherman's nets.