Game Girl - S1.E41

After watching Rainbow and Blue play it in Shipwreck Park, Sea Filly becomes addicted to a 2000 computer game called "Clam Blaster" and hardly does anything else. However, when she brings the video game to the School Of Fish one day and plays it there during a difficult maths test with Mrs Chips, she soon discovers that the video game itself is "dumb, violent and intellectually worthless".