Thursday Morning Riddle

I keep gas in the car; I make tracks on the field;
Where a group’s paid to think; how a failed project keeled;
Air for divers; a top with the shoulders revealed;
I’m where fish can be shown, and where sharks can be sealed.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

2 Responses to “Thursday Morning Riddle”

  1. Asher Says:

    Tank

  2. Bill Says:

    TANK is correct. Way to go, Asher!

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