If you like seeing aquatic animals with sharp teeth using their enamel to great effect, Discovery is hosting another of its annual Shark Weeks right now and it's taking the opportunity to let Fire TV and tablet viewers "Stream it Forward." It has partnered with Amazon to donate up to $75,000 to the Discovery Oceana Shark Fund. If you happen to go for a swim by August 4, you might get a sweet $25 out of it, too, though you will have to navigate through some catches — and we're not talking about prawns.

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