I'm reviewing your entry as a judge for "What a Character! : Official WDC Contest" by Writing.Com Support . Thanks for entering!
I take it this is a true set of events. If so, I imagine you, and your brother, have some stories to tell!
I like that this is engaging. It feels as if you are speaking directly to the reader. The stories not only give an insight to your brother but Marine life as well.
When the contest is judged, and you can, there are a few places that need cleaned up. A misspelled word here and there, clarification elsewhere.
Thanks again for entering!