Under the Sea Pajamas


My little one is fascinating : he wants to be an ichthyologist* and wants to switch from playing the violin to playing the electrical guitar...

Instead... I designed this print for him: all different fish and sea creatures are happily listening to a large blue musical octopus, playing a double-neck electric guitar... Blue whale and sea-horses are dancing around

All the sea creatures are in many shades of turquoise and light blue.

Luxuriously soft, 100% Peruvian Pima Cotton.

This print also exists in a short summer version...

I learn from my little one that Ichthyology, also known as fish science, is the branch of zoology devoted to the study of fish.

Question about sizing? Our pajamas are snug-fitted, and run small. Please upsize (age of the child+1= Petidoux size) when ordering

Question about sizing? Please do not hesitate to contact us via Instagram DM or email us:  reach out to us on our live-chat

  • MTV's video :"Hotel California" with Don Felder playing his double-neck electric guitar.
  • "20,000 leagues under the sea", the fiction book from French author Jules Verne. [published in 1870, original title "Vingt-mille lieux sous les mers"]
  • Musee de la Marine, Trocadero, Paris.
  • Natural History Museum, New York City.
  • Commandant Jacques-Yves Cousteau [1910-1997] and his famous Calypso ship.
  • Pantone Blue Atoll: 16-4535TPX
  • Ichthyology, aka fish science and includes bony fish, cartilaginous fish and jawless fish.
  • Water-based print,
  • Petidoux's own exclusive design
  • Manufactured in Peru.
  • Ultra-soft 100% interlock Peruvian Pima cotton 50/1.
  • No flame-retardant. No chemicals.
  • Pre-washed & pre-shrunk .
  • No pilling, even after many, many washes
  • Machine washable
  • Tumble dry low
  • Conforms to CFR 1615/1616. Comfortable snug fit (we would advise to size up when ordering)

For child's safety, garment should fit snugly. This garment is not flame resistant. Loose-fitting garment is more likely to catch fire.

Size chart
Age Height Weight Body Measurements (in)

In lbs Chest width Top Length Pants length Waist

(A) (B) (C) (D)
1 28-29 20-21 10 13.5 18.3 9.5
2 35-37 23-24 10.25 14.5 19.6 10
3 38-40 25-27 10.5 15.5 21.2 10.25
4 41-43 28-31 11 16.5 22.4 10.5
5 44-46 32-36 11.5 17 23.6 10.75
6 47-49 37-42 12 17.5 24.8 11
8 47-49 43-47 13 18.8 26.3 11.7
10 50-54 48-53 14 19.6 27.5 12.2
12 55-59
15 20.6 28.7 12.7

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Customer Reviews
5.0 Based on 3 Reviews
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I recommend this product
So soft!

My 5 year old daughters absolutely LOVE these pajamas! (note: they are above average in height, so I ordered size 7 and they fit perfectly) The pj's are super soft, wash and wear well, and have a fun, timeless print.

Caitlin D.
Love these!

Charming interesting pattern - highest quality, soft cotton.

Luiann G.
Under the sea

Great print and I love the fabrication sooo soft cotton. I do prefer the front button placket .... I am a big fan of your pj's ...wish you made them for me.....xxoo