Octonauts
Season 3 Episode 18 - The Urchin Invasion
7.2 ?
2010
Animation, Kids
The Octonauts head to the kelp forest to visit Shellington's sister, Pearl, and her newborn son Periwinkle - only to find the forest endangered by an infestation of kelp-eating urchins!
Episodes in Season 3
1
The Siphonophore
11 min
2
The Water Bears
11 min
3
The Cone Snail
11 min
4
The Artificial Reef
11 min
5
The Humpback Whales
11 min
6
The Pelicans
11 min
7
The Sea Pigs
11 min
8
The Yeti Crab
11 min
9
The Barracudas
11 min
10
The Duck-Billed Platypus
11 min
11
The Sea Skaters
11 min
12
The Mudskippers
11 min
13
The Harbour Seal
11 min
14
The Lion's Mane Jellyfish
11 min
15
The Red Rock Crabs
11 min
16
The Sea Sponge
11 min
17
The Immortal Jellyfish
11 min
18
The Urchin Invasion
11 min
NOW PLAYING
19
The Hammerhead Sharks
11 min
20
The Loggerhead Sea Turtle
11 min
