Ebirah, Horror of the Deep

After Yata (Toru Ibuki) is lost at sea, his brother Ryota steals a yacht with his two friends and a bank robber. The crew runs afoul of the giant lobster Ebirah and washes up on the shore of Letchi Island. The group devises a plan to defeat the Red Bamboo and escape from the island. The natives hope to awaken Mothra (now a full-grown moth metamorphosed from the larva that appeared in Ghidorah, the Three-Headed Monster) to rescue them.