An Under the Sea classroom theme is O’fishally the most fun for diving into learning. Use lots of blues as your base color and add lots of ocean creature accents like fish, netting, diving gear, etc. Scroll down to the bottom to see Ocean themed printables.

Amazon has a ton of cut-outs for you to make your ocean themed bulletin boards. As an Amazon affiliate, I may earn a commission for purchases using my links. Learn more. The ideas and paid links below are based on Amazon finds that are great for making an under the sea themed classroom. Here are a few examples of these below.

Decorate your teacher desk like the picture above or turn it into an ocean themed bulletin board. This one was created with these accents (#ad) and this matching border trim (#ad).

Bulletin board set for classroom wall or door (#ad)

Under the Sea classroom bulletin board with Pacon Bubbles paper (#ad) for the background.

This is another sea themed bulletin board on a classrooom door. It reads ‘Happy to SEA You’.

Under the Sea Classroom Calendar (#ad)

A beach background bulletin board backdrop (#ad) was used to make this awesome display in a fourth grade classroom.

I love that the sea plants in this picture are three dimensional. The paper is either rolled or twisted. Different shades of blue Kraft paper (#ad) was used for the background.

Red, blue and silver bulletin boarder trims in this ocean themed bulletin board. The silver border trim (#ad) reminds me of fish scales.

Ocean themed (#ad) classroom bulletin board

Tip: You can use colorful turtle shaped notepads (#ad) like this for making labels and bulletin board cut-outs. Just laminate then write on them.

Ocean themed wall decals for classrooms

Ocean themed classroom door sign (#ad)

Under the sea themed printables from my TpT collection:

 
Ocean themed Growth Mindset Posters and Ocean themed editable class lists

Ocean themed Class Timeable, Ocean themed Classroom Labels, and Ocean themed Center Labels.

Ocean themed Name Plates, Ocean themed Subject Headers, and Ocean themed Welcome Signs

Ocean themed Library Bin Labels and Ocean themed classroom labels (blank)

Ocean Themed All About Me Writing Activity and Ocean themed Meet the Teacher Newsletter

Under the Sea themed Classroom Rules

More under the sea themed classroom decor items at Amazon:

Check out this ocean themed book shelf for a classroom library. This is a beautiful bookshelf created without any sharp edges so that kids do not hurt themselves by accident. Beauty and safety comes together with this design.

The round table in this ocean classroom is covered with an under the sea themed fitted table cover. The teacher also added a beach umbrella and jellyfish lanterns to her classroom decor.

This classroom has a different type of jellyfish lantern.

More ideas will be added soon.