What do you do?- #2

SCENARIO

You are walking around the coast of Costa Rice, calmly, thinking you are safe along the coast, away from the dinosaurs. Suddenly, out of the water, a Suchomimus appears from the water.

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Naturally, you start running, then you get 20 feet away and notice that he is just eating fish. You just walk away fastly and quickly, but then from the trees...

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...emerges a Spinosaurus.

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It notices you and charges at you but lokks and notices the other Spinosaur, and it wants the huge, tasty, fresh fish the Suchomimus caught. It goes and they fight, SPino quickly wins, and since you have common sense, you run to your bike and get to your bike.

However, (Disregard the land terrain in the picture) the whole ground is sand. The SPino decides it will eat you and then go back to the fish. It charges at you, it will only stop it from eating you. It will reach you in anout 1 minute, since you run fast, but not faster than Spino.

ITEMS

You only have yourself, a shotgun with 5 bullets, but it is loaded. You have a flashlight, but it seems useless. You also have a telphone, but it has connection. You also have a fresh 5 pound fish you caught recently. You have NOTHING ELSE WITH YOU.

MORE DETAILS

It is daytime and the Spino is a grown adult. The Spino can also swim faster than you. There is no buldings near by.  Your bike is a normal 7-speed bike, no motor.

Feel free to add more details unless it doesn't go against the details.

So...

What do you do?