Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Can Cats Eat Seaweed? Vet-Approved Nutrition Facts & FAQ

Can Cats Eat Seaweed

It is no secret that most cats are fans of fish, and if you have a particularly keen cat, they might try to scoop fish out of your fish tank! Tuna and cats, for example, have been linked for generations. But can cats eat seaweed? If a cat loves fish, will they also like a side of seaweed to go with it? Yes; it may come as a surprise, but many cats enjoy eating seaweed. Seaweed is safe for cats, in moderation.  But is it good for them?

This brief guide will cover everything you need to know about cats and seaweed, including if they can eat seaweed sheets, whether nori is safe, and the health benefits of seaweed. It also covers how to feed seaweed to a cat and the seaweed to avoid.

divider cat faces oct 2024

Can Cats Have Seaweed?

Seaweed has several benefits for cats when it is prepared properly. The two biggest concerns with seaweed are the quantity of seaweed and the harmful ingredients that sometimes lurk in processed seaweed. However, cats can have seaweed as long as it is plain and unseasoned, and it can even be considered a healthy snack when consumed in this way.

There are no known species of seaweed that are deadly to cats, and of the 1,2000 estimated species of seaweed, there are only three that have ever been linked to illness (in humans) due to heavy metals within the seaweed, not the seaweed itself.

Although it is safe, not all cats will like seaweed. Some cats will refuse to eat it, and that is perfectly fine. Cats evolved to eat small animals and not seaweed. Plain seaweed can be used as a treat or supplement to add variety and nutritional benefits to your cat’s diet.

Seaweed on plate with chopsticks
Image by: Jeong-Seon, Shutterstock

Can Cats Eat Seaweed Sheets?

Cats can eat seaweed sheets as long as they are made of simple, plain seaweed. Seaweed sheets are flattened and packaged for shipping, and several companies sell them so that they can be used easily to make wraps.

Can Cats Eat Nori?

Sometimes, cats can eat nori. Nori is a Japanese culinary seaweed made from species in the genus Pyropia, including specific species P. yezoensis and P. tenera. Pyropia is a type of red algae and is typically flattened into sheets and then used to wrap sushi or dried to create flat, crunchy snacks.

Plain nori is safe for cats, but some products are treated with preservatives or salt to make them last longer. Be sure to check and ensure that any nori you are using is plain seaweed with no extra ingredients.

Nori is commonly used to create sushi wraps. If your cat gets into sushi, they will likely end up eating nori. Nori in sushi is generally safe for cats as long as there are no other ingredients in it.

Crispy-nori-seaweed-in-the-bowl
Image by: Viktorya Telminova, Shutterstock

divider cat faces oct 2024

Is Seaweed Good for Cats?

Yes, in moderation. Seaweed has several health benefits for cats, but it must be used as a supplement and not replace a balanced cat food diet.  It should only be fed in small quantities since some (dried) seaweeds can expand in the stomach, which could, in theory, cause a blockage.

Seaweed is filled with helpful prebiotics that promote gut health for kitties, and it is also high in fiber, so it helps regulate intestinal motility and reduce constipation.  Additionally, seaweed has a number of amino acids that help with coat and skin health. Cats that eat supplemental seaweed are said to have shinier and healthier coats over time due to the concentration of omega-3 fatty acids.

Seaweed also contains several vitamins and minerals, as well as a slew of antioxidants. The antioxidants can reduce the number of free radicals in your cat, and they can also help reduce inflammation. It does not take much seaweed for your cat to obtain these benefits.

Benefits:
  • Vitamins and minerals
  • Iodine helps maintain a healthy thyroid but is only beneficial in moderate amounts.
  • Vitamins A, E, and B12 maintain healthy skin, vision, immune function, and energy levels in cats.
  • Magnesium and Potassium benefit the heart, nerve impulses, and muscle control.
  • Amino acids
  • Fatty acids
  • Antioxidants
  • Promotes shiny coats

Seaweed to Avoid

While seaweed is safe and nontoxic for cats to eat, there are still some products that you need to avoid. There are many seaweed snacks and processed seaweed products that are not suitable for cats. You only want to feed your cat plain seaweed and avoid anything that has flavoring or spices.

Large quantities of salt, wasabi, and other spices are not healthy for your cat to eat. Some seaweed is processed into chips and crackers, and it has sodium and calories that your cat doesn’t need. For these reasons, the seaweed snacks should be avoided.

When in doubt, check the packaging and the ingredients. Buy and feed only plain seaweed instead of processed or flavored seaweed. Of course, if you would be in doubt, the easiest thing you can do is reaching out to a veterinarian and ask them for an advice.

Need veterinary advice but can't get to the clinic? Catster recommends PangoVet, our online veterinary service. Talk to a vet online and get the answers and advice you need for your cat without having to leave your living room — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

How Best to Feed Your Cat Seaweed

While some seaweed is safe for cats, they are not designed to live on a hefty diet of plant matter. Cats are obligate carnivores that get most of their nutrients from animal meat. Although cats can eat seaweed, you should only consider it a snack, supplement, or treat. You do not want it to be a main meal for your cat or an everyday staple.

Seaweed can benefit your cat, but only in small quantities. You want to be sure to moderate your cat’s portion sizes since seaweed naturally contains high levels of iodine that might not be suitable for your cat in large quantities.

To feed seaweed to your cat, be sure to get plain seaweed and serve it in small bites once a week, not daily. You can also rip the seaweed into small pieces and add it to your cat’s regular dry food. It will act more as a supplement, but your cat should eat it alongside their meal. Again, do not do this every day. Only do it once in a while.

fresh and dried japanese wakame seaweed
Image by: maramorosz, Shutterstock

divider cat faces oct 2024

So, Can Cats Eat Seaweed?

So now we know that cats can eat seaweed and it can even be a beneficial snack, but remember you should not serve large portions of seaweed to your cat. You can use seaweed as a special treat, snack, or supplement. If you feed plain seaweed to your cat occasionally, they’ll benefit from a range of antioxidants and vitamins. Many cats love seaweed and will happily eat it if you give them the chance. Just be sure to use plain seaweed without any additional ingredients.

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

How to Cool Down a Cat: 9 Vet-Approved Tips

When the hot weather rolls around, it is imperative to know how to look after your cat. All felines, just like humans, can...

How to Trim Cat Nails at Home: Vet-Approved Steps, Tips, & Advice

Grooming your cat is an important part of being a responsible pet owner, and nail trimming is a step that should not be...

Coughing in Cats: Causes & Treatments (Vet Answer)

If you’ve lived with a cat, chances are you’ve heard them coughing at some point. Some coughs can sound quite loud and coughing...

Does Lavender Calm Cats? Vet-Reviewed Facts & FAQ

Cats that spend time outside have likely come across many different types of plants, flowers, and foliage during their adventures. Some of the...

More related

How to Tell if Your Maine Coon Cat is a Mix (With Pictures)

Maine Coons are known as the gentle giants of the feline world. They’re gigantic compared to most house cats, reaching weights of up...

4 Free DIY Cat Couch Protector Ideas You Can Create at Home

Cats are notorious for digging their claws into anything they can. This seems especially true when it comes to your couch. For years,...

How Long Does It Take a Domestic Cat to Go Feral? Vet-Reviewed Facts

If you’ve ever had a pet cat that’s gotten lost or stolen, you may wonder what became of them. Did they find a...

20 Famous Cat Paintings – Exploring Modern and Classic Masterpieces

Cats have been among humans’ favorite companions for centuries, and their steady presence throughout the years has been noted in more than a...

Keep reading

Feline Lower Urinary Tract Disease: Our Vet Explains the Causes, Signs & Treatments

Is your cat urinating frequently? Are they going outside of the litter box? These signs may be vague or quite prominent. Your veterinarian might refer to the cause as feline lower urinary tract disease. Let’s look at some of the...

Ginger cat in blue litter box

Can Cats Eat Rice Cakes? Vet-Approved Nutrition Facts & Safety Guide

Rice cakes are a popular snack among vegan and health-conscious people. But are they a healthy snack for your cat? Rice cakes might seem harmless, but should you let your animals eat them? The answer is that rice cakes are...

Can Cats Eat Rice Cakes

Cat Yeast Infection vs. Ear Mites: Vet Reviewed Differences (With Pictures)

If your cat is constantly shaking their head and scratching their ears, a few scenarios may come to mind: Are they allergic to something? Are they sick? Have they been infested by parasites? Constant irritation is also a fairly common...

Cat Yeast Infection vs. Ear Mites

Can Cats Eat Cream? Vet-Reviewed Feeding Facts

Everyone knows the one about the cat that got the cream, but have you ever wondered if cats actually can, or should, eat cream? You might be surprised to learn that although cats would certainly love to devour a saucer...

Can Cats Eat Cream

Why Is My Cat Scratching the Mirror? Possible Causes & Solutions

There are several reasons a cat scratches a mirror. Figuring out the answer largely depends on the context of the behavior. Some cats may be trying to mark their territory since they have scent glands in their paws, and they...

Yeast Infection in Cats (Malassezia Dermatitis): Our Vet Discusses Signs, Causes & Treatment

Your cat is losing hair and, quite honestly, smells like corn chips. You know it’s not normal, so you call your veterinary hospital to schedule an appointment. Your head is spinning after your veterinarian suggests a skin impression and diagnoses...

vet examining red sore ear of a cat

3 Food Sources of Thiamine for Cats (Vitamin B1): Vet Reviewed Options

We all want our cats to be healthy, happy, and with us for as long as possible. That’s why we take them to the vet for checkups, feed them high-quality, protein-filled food, and keep them indoors most of the time....

Munchkin cat eating

How to Bathe Your Kitten: 5 Vet-Approved Steps (With Video)

Water and kittens don’t make the best combination, but sometimes, it’s inevitable that you need to give your kitten a bath. They may need a medicated shampoo to treat fleas or a skin infection. Orphaned kittens can sometimes need help...

kittens on carpet