---
title: "Shark Boy Costume — $0/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/shark-boy-costume"
last_updated: "2026-08-11T05:36:43.105Z"
locale: en
meta:
description: "Niche score 44/100 · $0/yr market · 192K searches/yr · $34.40 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · $0/yr market · 192K searches/yr · $34.40 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Shark Boy Costume — $0/yr Amazon US Niche (2026) - Flapen"
---
# **shark boy costume**
**Skip it**
A small market ($0/yr) — this niche doesn't clear our bar today.
Market size 0Growth 39Conversion 0Competition 70Returns 10Price range 70Avg price 95Brand share 72Review moat 71Quality gap 73
**Avg price**
**Incredible****$34.40**
avg listing price — sweet spot $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Good****62%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Good****671.86**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Good****43%**
top-5 click share — leaders hold, buyers still browse
**Price range**
**Good****$9.62–$131.79**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+11.5%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****9.3%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$0**
$0/yr · 192K searches
**Conversion**
**Bad****0.0%**
search→purchase rate — share of searches ending in a sale
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, shark boy costume is a $0/yr Amazon United States market (192K searches/yr). The top 5 brands hold 62% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 44/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **shark boy costume market data**
- **Units sold / yr**
- **500–750**
- avg 0–100/product
- **Revenue / yr**
- **$17K–$26K**
- units × avg price
- **Conversion rate**
- **0.0%**
- **Avg BSR**
- **#4,659**
- **Page quality**
- **0%**
- **Prime**
- **75%**
- **Sponsored**
- **72%**
- **Out of stock**
- **54.5%**
- **Avg brand age**
- **43 months**
- **Avg seller age**
- **191 days**
## **Competition & brand share**
The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**23 **▲rising
**Sellers**
**28**
**Top-5 brand share**
**62%**
Top 20: 98%
**Top-5 click share**
**43%**
Top 20: 81%
**Open market**
**34%**
- Fun Costumes22% - Touchat18% - Lucky2Buy8% - JUOLOET7% - inkArts6% - JCJ4%
## **Demand & seasonality**
Weekly Amazon search volume, last 89 weeks — +11.5% search growth over the last 90 days.
18K13KSpike '25Spike '26 seasonNovDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Sep, Oct, Nov · busiest ÷ quietest = 30.9×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/shark-boy-costume/trend)
## **Top shark boy costume search terms**
- **sharkboy costume**44K/yr+3.2%0.1% conv. - **shark boy costume**32K/yr-26.9%0.1% conv. - **sharkboy and lavagirl costumes**26K/yr+90.5%0.1% conv. - **shark boy and lava girl costume**10K/yr+34.1%0.0% conv. - **sharkboy costume adult**30K/yr+67.4%0.0% conv. - **sharkboy costume kids**5K/yr-17.2%0.0% conv. - **sharkboy costumes**4K/yr+35.2%0.0% conv. - **shark boy costume adult**19K/yr+67.6%0.0% conv. - **sharkboy and lava girl costume adult**3K/yr+304.0%0.0% conv. - **sharkboy costume men**5K/yr+229.4%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/shark-boy-costume/search-terms)
## **Top shark boy costume products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$010%$015%$020%$01101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Touchat Shark Blanket for Adult & Kids Super Soft Cozy Flannel Throw Wearable Blanket Cartoon Animals Shark Onesie Hoodie Sleeping Bag Cosplay Shark Costume Blanket Gifts for Shark Lovers (Blue M)**Touchat**$18.12**4.5★1,252 rev](https://www.amazon.com/dp/B0CC98BTQJ) [2**Lucky2Buy Womens One-Piece High Cut Superhero Cosplay Leotard Bodysuit Teddy Swimsuit Set**Lucky2Buy**$20.30**4.1★190 rev](https://www.amazon.com/dp/B0C9V84WGT) [3**Official Shark Boy and Lava Girl Toddler Gray Shark Boy Costume Boys Superhero Jumpsuit Costume**Fun Costumes**$58.06**4.5★330 rev](https://www.amazon.com/dp/B097VJSWVR) [4**JCJ Halloween Shark Costumes Stitch Onesie Pajamas for Kids Shark Sleeper Pajama Set Hooded for Boys Girls (9-10Y)**JCJ**$26.73**3.8★56 rev](https://www.amazon.com/dp/B0D91DMPLB) [5**HSCTEK Shark Onesie Costume Kids Baby Pajamas Cosplay Sleepwear Clothes 16**HSCTEK**$29.17**4.6★270 rev](https://www.amazon.com/dp/B0DB1WDGQC)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark X-Small**JUOLOET**$25.57**471 rev9mo ago](https://www.amazon.com/dp/B0FT147DB3) [**TBGENIUS Shark Blanket Hoodie Onesie for Adults and Kids Cozy Flannel Shark Costume Shark Sleeping Bag**TBGENIUS**$17.74**213 rev10mo ago](https://www.amazon.com/dp/B0FPVQMTT2) [**Newleafly Unisex Kids Shark Onesie Pajamas Soft Cozy Animal Onesie Halloween Cosplay Costume**Newleafly**$24.64**15 rev1y ago](https://www.amazon.com/dp/B0F99J9VL3) [**JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark Medium**JUOLOET**$28.16**471 rev1y ago](https://www.amazon.com/dp/B0DZCRJS4V) [**JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark Small**JUOLOET**$30.10**471 rev1y ago](https://www.amazon.com/dp/B0DZCQV1QQ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**haikyuu Kid Shark Costume Grey Pink Yellow Blue Fish Hoodie Boy Girl Halloween Birthday Party Dress Up (blue Small)**haikyuu**$21.60**3.6★**▲ 225%**](https://www.amazon.com/dp/B0G6FFR4PM) [**CuteCosplay Unisex Kids Shark Onesie Animal Cosplay One-Piece Pajamas Christmas Halloween Costumes**CuteCosplay**$20.58**4.5★**▲ 222%**](https://www.amazon.com/dp/B0CB13VQVS) [**DLiuguangX Unisex Adult Cartoon One-piece Shark Cosplay Costume Small Shayu**DLiuguangX**$9.62**4.0★**▲ 222%**](https://www.amazon.com/dp/B0D2GF8CZV) [**JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark X-Small**JUOLOET**$25.57**4.6★**▲ 220%**](https://www.amazon.com/dp/B0FT147DB3) [**Newleafly Unisex Kids Shark Onesie Pajamas Soft Cozy Animal Onesie Halloween Cosplay Costume**Newleafly**$24.64**4.1★**▲ 218%**](https://www.amazon.com/dp/B0F99J9VL3)
**~~View all trending →~~**
## **What buyers say about shark boy costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Soft Feel**16%
*“The material itself is soft and cozy, and the design is really cute”*
**Gifting Purpose**14%
*“Great gift”*
**Comfort-Overall**10%
*“comfortable”*
**Size-Overall**10%
*“Fit well”*
**Warmth**9%
*“cozy for year round use”*
**Quality-Overall**8%
*“Good quality”*
**Value For Money**4%
*“Great Buy”*
**Advertised Vs Actual Product**3%
*“As advertised”*
**Material Quality**2%
*“Material stays pretty soft”*
**Design-Overall**2%
*“Adorable shark design”*
### **What buyers complain about **
**Size-Overall**37%
*“Pretty big”*
**Durability**9%
*“Ripped the first day”*
**Quality-Overall**9%
*“not well made”*
**Stitch/Finish/Polish**6%
*“the seams were coming apart”*
**Gap/Hole**5%
*“Arrived with hole”*
**Advertised Vs Actual Product**4%
*“Product description was way off”*
**Material Quality**2%
*“The material was very cheap”*
**Thin**1%
*“Thin material”*
**Zipper Quality**1%
*“Also there is NO WAY TO ZIP IT by yourself”*
**Design-Overall**1%
*“not great product design”*
### **Top return reasons **
**Size-Overall**60%
**Length**13%
**Gap/Hole**4%
**Stitch/Finish/Polish**3%
**Advertised Vs Actual Product**3%
**Material Quality**3%
**Sleeve Fit**2%
**Arm Fit**1%
**Shoulder Fit**1%
**Thigh Fit**1%
## **Common questions**
- **Is shark boy costume profitable to sell on Amazon United States?**
- The niche generates $0/yr across 36 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is +11.5%. Flapen's verdict: Skip it (44/100).
- **How competitive is the shark boy costume niche?**
- 23 brands and 28 sellers compete. The top 5 products take 43% of clicks and top 5 brands hold 62% of demand.
- **What do buyers complain about in shark boy costume?**
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 9.3% — above our launch gate.
- **When does demand for shark boy costume peak?**
- Demand peaks in Sep–Oct–Nov; the busiest month runs 30.9× the quietest.
- **What does it cost to enter the shark boy costume niche?**
- Listings span $9.62–$131.79; the average listing price is $34.40 (sweet spot $15–$100). The average incumbent carries 672 reviews — the moat a new listing must climb.
## **Related niches in Clothing, Shoes & Jewelry**
- 72 [**first communion gifts for boys**](https://flapen.com/research/us/clothing-shoes-jewelry/first-communion-gifts-for-boys)$398K/yr+223.5%**Worth a look**- 72 [**fifa world cup 2026 tshirt**](https://flapen.com/research/us/clothing-shoes-jewelry/fifa-world-cup-2026-tshirt)$177K/yr>1,000%**Worth a look**- 72 [**american flag hat**](https://flapen.com/research/us/clothing-shoes-jewelry/american-flag-hat)$764K/yr+428.8%**Worth a look**- 72 [**white socks men**](https://flapen.com/research/us/clothing-shoes-jewelry/white-socks-men)$3.0M/yr+13.3%**Launch it**- 72 [**american flag overalls**](https://flapen.com/research/us/clothing-shoes-jewelry/american-flag-overalls)$662K/yr>1,000%**Worth a look**- 73 [**white ankle socks for men**](https://flapen.com/research/us/clothing-shoes-jewelry/white-ankle-socks-for-men)$448K/yr+88.3%**Worth a look**[**All Clothing, Shoes & Jewelry niches **](https://flapen.com/research/us/clothing-shoes-jewelry)