The marine biologist studied the diverse ecosystems found within the coral reefs.
Marine biologists use hydrophones to record underwater sounds.
"The marine biologist was looking forward to studying the octopus."
"Are you still in the marine?"
E.T. stands for extra terrestrial. Amphibians are comfortable in marine environments and terrestrial environments.
No, you do not capitalize marine biologist in a sentence. (Unless marine is in the beginning of the sentence)
This looks like a job for a marine surveyor.
The ocean is home to a diverse range of marine life, from tiny plankton to massive whales.
When writing a sentence
No, "marine aviator" is not capitalized in a sentence unless it is part of a specific title or name. Generally, it is treated as a common noun, so you would write it in lowercase. For example: "The marine aviator completed his training."
The researchers sent a submarine deep into the ocean to learn more about the life there.
This is fascinating to me for multiple reasons.
The word "plankton" is a noun. An example of a sentence using the word would be: Plankton are a vital organism, as they provide food for many of the ocean's creatures.