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As long as they stay babies is how long they stay babies.
a few of the sea animals cannot stay under water for a long time.
Thie Sea Robin, a marine fish, measures in at up to 16" long
Here is a list of friendly marine animals of the sea dolphins, orcas, beluga whales, different types of fish and plankton.
4 Days
They are extremely important. They help find ways to keep the ocean clean, they discover sea animals and they help the marine animals stay safe.
2 min if your DI is feeling merciful
about 10 minutes
2 to 5 years
marine turtles live in oceans.
The Marine Mammal Center recommends that people should stay 150 feet away from seals and sea lions.
That depends on what service you join. The Marine Corps is approx 13 weeks.