Have you considered tutors such as Worldly Tutor and Mystical Tutor , which might help the consistency of your deck? Nimbus Swimmer , Prime Speaker Zegana , Spearbreaker Behemoth , Murkfiend Liege and Beast Whisperer might also be good for this deck. Also, you might want a better manabase with Breeding Pool , Misty Rainforest (if you have the budget for it), and Hinterland Harbor .

Thanks for these suggestions, Hexaflexagon. I'm not too worried about tutoring, as its mainly meant to be a casual deck with a fun theme. I had thought about Nimbus Swimmer , but just went a different direction. I do like Spearbreaker Behemoth , but doesn't fit the tribe, but is great support. I could definitely see adding Murkfiend Liege , especially for untapping Leviathan and Island Fish Jasconius .

The mana base is as it is mainly because of budget. I just can't afford to go get $80 lands, and some of the better ones I have are going in more focused decks.

Thanks for taking a look!

I really like the deck, I tried to make a similar one but was never able to get it where I wanted it to be.

Sea monsters all have really high cmc so I suggest ways to cheat them into play such as Genesis Storm , Genesis Wave , Selvala's Stampede , Tooth and Nail and See the Unwritten .

A deck full of high cmc creatures also needs a lot of ramp to keep up with other decks. I personally think you should up your ramp package and add a couple more lands. Frontier Siege is a card I really like, choose khans for 2 green main phase 1 and 2 more main phase 2.

You are running Shamanic Revelation but I think cards like Rishkar's Expertise / Soul's Majesty are likely to draw more cards. You will probably more often have a creature with 5+ power out than 5 creatures on the board.

Fixing the top card of your deck is already a subtheme so it may be worth trying out Lurking Predators .

Thassa, God of the Sea seems to do everything you want. Fits theme, grants unblockable, and helps rig your top card.

Good luck with the deck.

RoaringBunny, thanks for the suggestions, and for the upvote. I am actually running Rishkar's Expertise over Shamanic Revelation , I just forgot to change it. I did have Soul's Majesty originally planned, but I think I went with Elemental Bond instead. I typically favor effects that draw me cards over time as opposed to one-shot spells. Lurking Predators is awesome, and I run one in my Dinosaur Tribal deck, and its a killer. If I get one eventually, it'll go in here, too. I also like Thassa, God of the Sea , and I'll consider adding it eventually. Budget restrictions are a thing for me, but I'll look for the card may pick one up eventually.

Where are the Kioras? Like the deck though :)

Thanks, EPICSpider23. I don't have any Kioras just sitting around, and I don't really go all out to purchase planeswalkers a lot, unless they really fill a need in the deck. Two of them look decent, though, and could provide some value.