My husband and I took Buddy and our other dog on the boat fishing. We saw a 5 – 6 ft shark swim up to the boat. Buddy got so excited he ran and jumped into the water as fast as he could and swam after the shark. He is lucky he is a big dog and made a huge splash to scare the shark away, as well as any fish nearby that we were trying to catch! I actually had to yell at him to come back, and it took the 2 of us to hoist him up into the boat (I was panicking the whole time that the shark would come back). Funny part is, when we stopped at the beach and tiny little fish would come up to his paws, he would back away afraid of them.
Out of all the shaming-worthy things Buddy has done since we adopted him, this one came the closest to giving me a heart attack.