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Octonauts
S3E18 · The Urchin Invasion
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Episodes
E1
The Siphonophore
2013-09-04
E2
The Water Bears
2013-09-05
E3
The Cone Snail
2013-09-06
E4
The Artificial Reef
2013-09-09
E5
The Humpback Whales
2013-09-10
E6
The Pelicans
2013-09-11
E7
The Sea Pigs
2013-09-12
E8
The Yeti Crab
2013-09-13
E9
The Barracudas
2014-03-10
E10
The Duck-Billed Platypus
2014-03-11
E11
The Sea Skaters
2014-03-12
E12
The Mudskippers
2014-03-13
E13
The Harbour Seal
2014-03-14
E14
The Lion's Mane Jellyfish
2014-03-17
E15
The Red Rock Crabs
2014-03-18
E16
The Sea Sponge
2014-03-19
E17
The Immortal Jellyfish
2014-03-20
E18
NOW
The Urchin Invasion
2014-03-21
E19
The Hammerhead Sharks
2015-09-21
E20
The Loggerhead Sea Turtle
2015-09-22