Summary from GoodReads:
The Weaved Catcher is the first book in Stephen Vadakin's series "The Adventures of the Thundering Whales." The books follow the exciting adventures of the three young dolphin friends Thunder, Flukie and Sapphire. In The Weaved Catcher, Thunder becomes caught in a fishing net and falls far, far down into the ocean depths. How can he ever escape? What happens when his friends rush to rescue him? When you read the answers to these questions in the book, you will meet some massive and amazing sea creatures. Blue whales, humpback whales, a giant squid and the Swordfish Police Patrol are all part of the fun and adventures!