在上一次试图击败海王（杰森·莫玛 Jason Momoa 饰）未果后，黑蝠鲼（叶海亚·阿卜杜勒-迈丁 Yahya Abdul-Mateen II 饰）依然不甘放弃为父报仇，誓要消灭海王。这一次，他找到了传说中的黑暗三叉戟，释放出古老的邪恶力量，比以往更来势汹汹。为了与之抗衡，海王向被囚禁狱中的弟弟奥姆（也是前亚特兰蒂斯国王，帕特里克·威尔森 Patrick Wilson 饰）求助，组成了出乎意料的联盟。他俩必须抛弃前仇旧怨，携手并肩作战，才能从即将到来的灾难中保卫王国，拯救家人，拯救世界。...
A dangerous tidal wave washes all the fish up in the trees, which is also a big problem for the poison dart frogs who don't have enough puddles up in the trees for the tadpoles. Luckily, Tweak's new Gup-H is ready to help....
The Octopod is grabbed by a colossal squid. The Octonauts are unable to break free due to the hooks on the ends of the squid's tentacles. Fortunately the arrival of some sperm whales turns the squid from hunter to hunted....
Kwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore - and when a geyser blasts it toward the surface, the Octonauts must stop its ascent before it fatally bursts....
When a prehistoric Sponge is unfrozen, he causes chaos all over town - and only SpongeBob can communicate with him! When a flock of clams descend on Bikini Bottom, SpongeBob has to get them out before they ruin the whole town!...
