Current Price $9.20
Highlights
- Hyaluronic acid
- Salicylic acid (BHA)
- Best for: Normal skin
Details & care
What it is: An exceptionally lightweight serum that acts as a hyaluronic-acid alternative, which directs water where you need it most.
What it does: By combining exopolysaccharides from skin-friendly marine bacteria, Hawaii red algae, glycoproteins from Antarctic marine sources, micro-filtered blue-green algae and several amino acids, this water-based formula targets hydration below the skin's surface, resulting in a softer, plumper complexion.
How to use: Apply a few drops to the face in the morning and evening. If irritation occurs, rinse off, cease use and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised. Keep out of reach of children. The serum is good for 12 months after opening.
- Paraben-free; phthalate-free; sulfate-free; silicone-free; fragrance-free; oil-free
- The ingredient list shown here may vary from the box of the product depending on time and region of purchase
- Store at room temperature
- Made in Canada
- Item #7534455
Ingredients
Aqua (Water), Glycerin, Algae Extract, Pseudoalteromonas Exopolysaccharides, Pseudoalteromonas Ferment Extract, Ahnfeltia Concinna Extract, Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Aspartic Acid, PCA, Sodium PCA, Sodium Lactate, Salicylic Acid, Citric Acid, Propanediol, Dimethyl Isosorbide, Ethoxydiglycol, Polysorbate 20, Potassium Sorbate, Sodium Salicylate, Sodium Benzoate, Hexylene Glycol, 1,2-Hexanediol, Phenoxyethanol, Caprylyl Glycol.
Ingredients are subject to change at the manufacturer's discretion. For the most complete and up-to-date list of ingredients, refer to the product packaging
Shipping & returns
This item is only available for pickup at select Nordstrom stores.
Purchases made online can also be returned or exchanged at any Nordstrom store, free of charge. Learn more about our shipping &returns policies.
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Delivery
- Email gift message (free)
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The Ordinary
The Ordinary is democratizing skin care by bringing well-known active ingredients to market at sensible price points. All products are made in the brand's lab, tested on humans (The Ordinary is vegan and cruelty-free) and use ingredients at their highest quality and most effective concentrations. The Ordinary is Clinical Formulations with Integrity.
Most helpful positive review
Mar 24, 2026
Please make larger size for body!
I’ve been using Marine Hyaluronics for years with excellent results. It delivers supreme hydration to my very dry skin, particularly in winter months. I also use it on a flaky patch of skin I get on my elbow periodically (not psoriasis or eczema) from leaning on it while watching tv in bed. It transforms the flaky patch of skin to soft and supple in 5 days or less!
What I wish is that The Ordinary would listen to their customers and make this in a larger spray bottle for use on the body!
Msmugler
Reposted from deciem.com
Most helpful critical review
July 16, 2025
It's just water?
I thought this would moisturise my skin or at least help it along whilst still using my main facial moisturiser...this is literally just plain old water, it does nothing. Zero. It's one of the cheaper items on here but honestly don't waste any of your money!
Deb J
Reposted from spacenk.com
5 stars
77%
4 stars
11%
3 stars
5%
2 stars
3%
1 star
4%
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Cons:
Sort by Most Helpful
Msmugler
Reposted from deciem.com
Mar 24, 2026
Please make larger size for body!
I’ve been using Marine Hyaluronics for years with excellent results. It delivers supreme hydration to my very dry skin, particularly in winter months. I also use it on a flaky patch of skin I get on my elbow periodically (not psoriasis or eczema) from leaning on it while watching tv in bed. It transforms the flaky patch of skin to soft and supple in 5 days or less!
What I wish is that The Ordinary would listen to their customers and make this in a larger spray bottle for use on the body!
scoo
Reposted from spacenk.com
Mar 19, 2026
Amazing value
This is super nice and light and very hydrating. It doesn't pill under makeup like some of the other silicone based ones from The Ordinary do. My favorite more affordable serum when I don't want to shill out £££ for hyaluronic serums to wear in the day. I'd keep more expensive ones for Night time
Hotpink
Reposted from spacenk.com
Mar 5, 2026
Is this just water?
This really is just like water. Really hard to get it on your face without spilling it. I think it would be so much better if it was in a spray bottle to mist on. Not sure if this is doing anything to my skin, but I will buy an empty spray bottle, transfer it and see what happens.
Emily_B
Reposted from spacenk.com
Feb 28, 2026
Good
The Marine Hyaluronic Serum is a lightweight product that absorbs into the skin quickly. It delivers hydration and a beautiful glow to your face. I like to use this before makeup so that my base is flawless. Overall, I really recommend if you are looking for hydration and dewiness in your skincare routine.
Alix
Reposted from deciem.com
Feb 24, 2026
Instant Hydration
I don't know how they do it but they do it for sure. This serum is by far the most useful serum I've ever used. It Hydrates with a capital H. It's like my face has never been hydrated before this.
natty04
Reposted from deciem.com
Feb 8, 2026
Lightweight hydration
My new favourite serum! I would love this in a big spray bottle - I would bring it with me everywhere.
Amazing watery texture serum that delivers results. I’ve been so dehydrated this winter and have tried so many creams and balms that are too heavy for my combination, sensitive skin. This has been a game changer. Please never discontinue Marine Hyaluronics 🌊
