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Quick, easy, and healthy – you will love these protein-packed spicy tuna seaweed snacks! Made with nutritious ingredients like canned tuna, nori, cucumber, celery, and sriracha.

Spicy tuna seaweed snack close up.

Not sure what to eat with seaweed snacks or sheets of nori? This recipe tops them with a spicy tuna, mayo, and veggie mixture for a delicious snack idea!

These bite-sized tuna seaweed wraps come together in about 15 minutes. As a dietitian, I’m happy to share that they pack in a ton of nutrition benefits – from the seaweed, canned tuna, and veggies.

You can enjoy these tuna snacks between meals, or enjoy a larger portion as a light (but protein-packed) lunch. The combination of protein (from tuna) with fiber (from the veggies) and fats (from mayo) help to keep you full and satisfied.

Want more healthy snack ideas? Check out my roundup of make-ahead snack recipes. For something quick, you may also love my popular peanut butter greek yogurt bowl or my avocado snack with balsamic! I make these 2 recipes regularly 🙂

Seaweed snacks topped with spicy canned tuna mixture.

Nutrition benefits of nori seaweed

Nori is a type of dried, edible seaweed. Popular in Japanese cuisine, you may be most familiar with nori as the type of seaweed that wraps rolls of sushi.

What you may not have known, however, is that nori (like other types of seaweed) is actually super nutritious!

In particular, nori is rich in many vitamins and minerals, including:

  • iodine (seaweed is a great way to increase your intake of iodine, which is essential for proper thyroid function)
  • vitamin C
  • potassium
  • vitamin A
  • calcium
  • iron
  • zinc
  • vitamin B12

Where to buy seaweed

You can often find nori in the Asian section of your local grocery store. I typically find it hanging near the area of Asian seasonings, like soy and teriyaki sauce.

If it’s not available at your local grocery store, you can also check more specialty Asian supermarkets. Otherwise, nori sheets are also available through online retailers like Amazon. I enjoy brands like GimMe and Seasnax.

Nori is sold in different formats. You can often find nori in larger, plain sheets (feel free to cut them into smaller pieces for this recipe – that’s what I did).

OR, you can find pre-seasoned “seaweed snacks” that are often roasted with additional salt and oil. These will of course have a bit more flavour, and are great for snacking on their own!

Whichever you choose is totally personal preference and both will work for this tuna seaweed snack recipe.

Recipe ingredient flatlay.

About the ingredients + possible substitutions

  1. Seaweed (nori): As described in depth above, you can find sheets of nori or pre-seasoned seaweed snacks in the Asian section of your local grocery store (or online). It’s totally your preference to choose plain sheets or the pre-seasoned snack format. If purchasing the larger sheets, you can cut them into 4 smaller pieces for this recipe.
  2. Canned tuna: I recommend choosing tuna canned in water, rather than oil. This will work a bit better when mixed with the mayonnaise. Choosing canned LIGHT tuna (or “skipjack”) also ensures a lower mercury content than albacore (or “white” tuna).
  3. Avocado oil mayo: I love using avocado oil mayo, but you are welcome to use regular mayo as well. If you don’t want to use mayo, you could swap it with some mashed avocado and/or plain greek yogurt – similar to how I’ve done in this no-mayo tuna salad.
  4. Persian cucumber: I love how perfectly sized and crunchy Persian cucumbers are, but feel free to use a long English cucumber instead.
  5. Celery: Celery adds the perfect crunch and extra veggies to this recipe.
  6. Sriracha: This hot chili sauce is only moderately spicy, so no need to worry that this recipe will be too hot to handle! That said, feel free to adjust the amount you use according to desired preferences. If you want to make this tuna snack for your kids, you’re welcome to omit the sriracha or use only a very small amount.
  7. Garlic powder: Added to the spicy tuna mixture for an extra punch of flavour. I find garlic powder distributes among the ingredients more evenly and has less of an overpowering garlic taste than fresh cloves (which is preferable for this recipe).
  8. Green onion: Also known as scallions, diced green onions add a milder onion-like flavour to this recipe.
  9. Sesame seeds (optional garnish): If you have them on hand, feel free to garnish with some black or white sesame seeds!

Step-by-step: how to make tuna seaweed snacks

Canned tuna, diced cucumber, celery, green onion, mayo, and sriracha in a bowl.

Start by adding drained canned tuna, diced cucumber, celery, and green onion, along with mayo, sriracha, and garlic powder to a large bowl.

Spicy tuna and veggie mixture in a bowl.

Stir all ingredients together well to create the spicy tuna topping for your seaweed snacks. Feel free to adjust seasonings to taste, making it more spicy or more “mayo-y” as desired.

Spicy tuna seaweed snack on a white plate.

Place small sheets of nori on a plate (you can cut them to size if starting from large sheets). Then, scoop tuna mixture into the center of each sheet and garnish with sesame seeds (if desired). Enjoy immediately!

Full ingredient measurements and detailed instructions are located in the recipe card at the bottom of this post!

Canned tuna nutrition benefits

Tuna is an awesome source of:

  • complete protein, with a standard 3 oz (85 gram) serving of tuna provides about 22 grams
  • omega-3 fatty acids
  • micronutrients like:
    • selenium
    • vitamin D
    • iron

Canned tuna’s high protein content makes it the perfect addition to this healthy snack idea. Protein helps to keep you feeling fuller and more satisfied between meals, which is exactly what we’re looking for in a snack!

More easy, healthy snack recipes

Did you give this Tuna Seaweed Snack Recipe a try? Let me know by leaving a comment and recipe rating below!

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Get the Recipe: Tuna Seaweed Snacks (Quick, Easy & Healthy!)

Quick, easy, and healthy – you will love these protein-packed spicy tuna seaweed snacks! Made with nutritious canned tuna, nori, cucumber, celery, mayo, and sriracha.
Prep Time: 15 minutes
Total Time: 15 minutes
Servings: 2
Spicy tuna seaweed snack close up.
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5 from 4 votes
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Ingredients

  • 1 small can tuna, in water (approx. 120 grams or 4 oz. DRAINED)
  • 1.5 Tbsp mayonnaise (I used avocado oil mayo)
  • 1 Persian cucumber, diced (or about 1/4 of an English cucumber)
  • 1 stalk celery, diced
  • 1/4 cup green onion, diced
  • 2 tsp sriracha (or to desired spiciness)
  • 1/2 tsp garlic powder
  • Salt + pepper, to taste
  • 8 squares nori seaweed (use seaweed snacks or cut large sheets into smaller pieces)
  • Sesame seeds (optional garnish)

Instructions

  • Drain excess water out of canned tuna. Transfer to a large bowl and flake with a fork.
  • Into the same bowl, add diced cucumber, celery, green onion, mayo, sriracha, garlic powder, salt, and pepper. Stir ingredients together until well combined. Feel free to adjust seasonings to taste, making it more spicy or more "mayo-y" as desired.
    *Do note that the amount of salt you add will depend on how salty your seaweed snacks are! If purchasing unsalted nori, you will have to add more salt to the tuna mixture than if using pre-seasoned tuna snacks. You can always add more when serving as needed!
  • If using larger sheets of nori, you can cut each sheet into 4 pieces. Otherwise, place seaweed snacks on a plate and top with tuna mixture. Recipe as written should make about 8 "bites" or "wraps."
  • Garnish with sesame seeds and more sriracha, if desired. Enjoy immediately, eating the tuna seaweed snacks as bite-sized wraps.

Notes

*SERVINGS: Recipe as written will make a snack for about 2 people. Otherwise, you could enjoy the recipe as 1 person for a quick lunch or dinner!
*MAKING IN ADVANCE:
  • If you’d like to make this snack ahead of time, you can prepare the tuna-mayo mixture first. Store it in an airtight container in the fridge, up to about a day in advance.
  • Add the tuna mixture to seaweed immediately before eating. Otherwise, the seaweed will become too soft/soggy.
 
*INGREDIENT NOTES:
  • You can find sheets of nori or pre-seasoned seaweed snacks in the Asian section of your local grocery store (or online). It’s totally your preference to choose plain sheets or the pre-seasoned snack format (which are roasted in oil + salt). If purchasing the larger sheets, you can cut them into 4 smaller pieces for this recipe.
  • Please adjust the amount of sriracha used according to your desired level of spiciness. As written, the amount of spice here is quite mild! If you want to make this for your kids, you are welcome to omit the sriracha or only use a small amount.
  • I love using avocado oil mayo, but you are welcome to use regular mayo as well. If you don’t want to use mayo, you could swap it with some mashed avocado and/or plain greek yogurt – similar to how I’ve done in this no-mayo tuna salad.

Nutrition

As a dietitian, I create recipes with whole food ingredients that provide the nutrients needed for optimal health. My nutrition philosophy does not focus on numbers; however, I understand that this information can be helpful.

Do note that the nutrition info provided is an estimate and I cannot guarantee correctness of the displayed values. These numbers will differ depending on brands used, recipe modifications, and amount eaten. If you require specific nutrition information due to medical reasons, please consult with your dietitian or physician.

Course: Snack
Cuisine: American, Asian, Japanese
Diet: Gluten Free, Low Lactose
Keyword: canned tuna, easy, healthy, quick, seaweed, simple
Author: Carrie Walder

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This post may contain affiliate links. Please see my disclosure policy.