A marathon.
A game that is related to the sea and starts with T is Tug a War.
Muffdiving
A marathon.
apples to apples
Turtle
Something that belongs to a teenager that starts with M and sea related is: Moter Boat and Muffdiving equipment.
tocos is sea related
Motorboat
One game played in water is Marco Polo.
Some sea related common nouns are:tankertiger sharktidetortoisetraveltrenchtsunamitube wormsturquoisetunaturtle weed algae
Piri Reis was an explorer who sailed and charted the ports in the Mediterranean Sea.
Raise the Titanic 1980.