Ocean (Modifications)

The Ocean is a biome which appears on the surface, composing of the very western and eastern regions of the world. It consists of a giant indention into the surface which is filled with water, and it gets deeper the closer to the map edge you are.

Ocean Chests will sometimes spawn in the Ocean as well, which will contain unique pre-boss loot which is based on water. The Ocean also contains unique enemies, such as Crabs, Sharks, Squids, and more.

Under the left Ocean is a unique biome, The Depths, as well.

The Ocean has its own kind of tree, the Palm Tree, which can be harvested for Palm Wood.

The Ocean has several layers where different enemies spawn.

Blocks:

 * Sand Block
 * Sandstone

Enemies:

 * Pink Jellyfish
 * Red Jellyfish
 * Crab (Passive)
 * Sea Snail (Passive)
 * Sea Snake
 * Squid
 * Colossal Squid (Mini-Boss)
 * Shark
 * Great Abyssmal Shark (Mini-Boss, Hardmode)
 * Angler Fish (Hardmode)
 * Orca (Hardmode)
 * Aquatic Pigron (Hardmode)
 * Blue Whale (Passive, Hardmode)
 * Sperm Whale (Hardmode)
 * Great Sea Snake (Hardmode, Mini-Boss)
 * Duke Fishron (Boss)

Unique Loot:

 * Trident
 * Flipper
 * Breathing Reed
 * Beach Ball
 * Water Walking Boots

Unique Drops:

 * Shark Fin (Shark)
 * Abyssmal Fin (Great Abyssmal Shark)
 * Diving Helmet (Shark, Orca, Sperm Whale, Blue Whale)
 * Black Ink (Squid, Colossal Squid)
 * Aquatic Scale (Sea Snake, Great Sea Snake, Duke Fishron)
 * Purple Mucos (Sea Snail)
 * Jellyfish Necklace (Pink Jellyfish, Red Jellyfish)
 * Glowstick (Pink Jellyfish, Red Jellyfish)
 * Pirate Map (Any enemy in Hardmode)

Unique Terrian Items:

 * Coral
 * Seashell
 * Starfish
 * Palm Wood
 * Lime Kelp

Unique Fishing Items

 * PInk Jellyfish (Bait)
 * Red Jellyfish (Bait)
 * Reaver Shark
 * Red Snapper
 * Sawtooth Shark
 * Shrimp
 * Swordfish
 * Trout
 * Tuna

For Sale:

 * Parrot Cracker

0-50 blocks:

 * Pink Jellyfish
 * Sea Snake
 * Squid
 * Crab

50-100 blocks:

 * Pink Jellyfish
 * Red Jellyfish
 * Sea Snake
 * Squid
 * Shark
 * Sea Snail

100-150 blocks:

 * Red Jellyfish
 * Sea Snake
 * Great Sea Snake
 * Squid
 * Shark
 * Orca
 * Sea Snail

150-200 blocks:

 * Red Jellyfish
 * Sea Snake
 * Great Sea Snake
 * Squid
 * Colossal Squid
 * Shark
 * Orca
 * Aquatic Pigron
 * Angler Fish
 * Blue Whale

200-250 blocks:
At 250 blocks, the Depth's entrance will appear.
 * Great Sea Snake
 * Colossal Squid
 * Shark
 * Great Abyssmal Shark
 * Orca
 * Aquatic Pigron
 * Angler Fish
 * Blue Whale
 * Sperm Whale