Quick Summary
Sea Sponge - When a sea sponge that shelters marine creatures becomes mysteriously ill, Peso must race to discover the cause, delivering a thrilling mix of adventure and marine wonder for CBBC viewers.
About This Program
Programme Overview
Sea Sponge is a CBBC episode that transports young viewers into a colourful underwater realm where a humble sea sponge serves as a bustling sanctuary for a variety of marine creatures. The sponge’s porous structure creates a tiny ecosystem, offering a vivid backdrop for both visual wonder and subtle education. In this installation the sponge falls victim to a mysterious illness that threatens the health of its resident sea‑life, prompting a compelling mystery that drives the narrative forward.
Plot Synopsis
The story centres on the curious character Peso, who discovers that the sponge’s pores are no longer filtering water and nutrients as they should. As the sponge’s condition worsens, the creatures that rely on it begin to show signs of distress. Determined to help, Peso takes on the role of a young detective, examining clues within the sponge’s anatomy, consulting the surrounding reef, and applying simple scientific reasoning to uncover the hidden cause of the illness.
What to Expect
Viewers can anticipate a blend of gentle adventure and educational content, presented in the engaging style typical of CBBC programming. The episode balances suspense with clear explanations of marine biology, encouraging children to think critically about ecosystems and the importance of caring for the environment. Striking underwater visuals, combined with Peso’s problem‑solving journey, keep younger audiences captivated while delivering substantive information about sponge anatomy and symbiotic relationships.
Why Watch
‘Sea Sponge’ offers UK families a wholesome viewing experience that combines striking visual storytelling with a relatable hero in Peso. Its focus on inquiry, scientific thinking and ecological awareness aligns with current British TV trends that promote sustainability and curiosity about the natural world. The episode is ideal for weekend family viewing or school‑linked programmes, providing both entertainment and a gentle introduction to marine science for children and parents alike.
Octonauts broadcasts on CBeebies HD at 3:25pm, Wednesday, 5 November 2025. (Subtitles, repeat)