If you can, I'd cut the Starboys in favor of a second Yomi Ship and 2 Lost Blue Breaker. With cards like Needle Sunfish, Yomi Ship, and Lost Blue Breaker you have less of a need for removal.
I like Lost Blue Breaker quite a bit for its ability to let me deal with spells and traps if I need as well as offering good fodder for Daedalus. I'd consider finding space for it.
With Yomi Ship and Needle Sunfish, you get a lot of creature removal. You don't need Yomi Ship, Needle Sunfish, SRH, EC, and Mirror Wall all in the same deck. Seems a little overboard to me.
Your win condition is either field control using Daedalus or having a large number of beater monsters in play. I'd focus more on Uminotaurus/Hammershark than on support cards like Starboy. Starboy is pretty easy for your opponent to pick off doing damage to you in the process. Better to rely on Umi/Legendary Ocean for your damage boost.
Try to stick to 20 cards. The extra 1 from Shard of Greed actually hurts you some just having the extra card (think my math on the changes above was a little off...) For this deck, I'd prefer "Moray of Greed" anyways as it has better synergy with your deck.
I like my Hammershark deck quite a bit too, it's the first competitive deck I built. It makes me sad that they do so poorly in the meta now.
why is this image not in a museum? this is a rarity .. when the Persians were fighting the Nazis .. someone took a screenshot in this image and sent it to the gameA website