PHILADELPHIA — After chewing up television with its wildly popular Shark Week, Discovery Communications aims to snatch an even bigger bite for its popular franchise: comic books. The parent company of Discovery Channel and Animal Planet hopes to make a big splash when it releases its first comic book, “Top 10 Deadliest Sharks.” The book — dubbed a nonfiction graphic novel — comes out Dec. 1 and is being published by Philadelphia’s Zenescope Entertainment under the Silver Dragon Books imprint.