---
title: "Baby Shark Costume Adults — $30K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/baby-shark-costume-adults"
last_updated: "2026-08-06T02:34:51.451Z"
locale: en
meta:
description: "Niche score 47/100 · $30K/yr market · 51K searches/yr · $27.35 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $30K/yr market · 51K searches/yr · $27.35 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Baby Shark Costume Adults — $30K/yr Amazon US Niche (2026) - Flapen"
---
# **baby shark costume adults**
**Skip it**
High returns (12.0%) — this niche doesn't clear our bar today.
Market size 8Growth 55Conversion 27Competition 77Returns 0Price range 95Avg price 95Brand share 48Review moat 78Quality gap 47
**Avg price**
**Incredible****$27.35**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$15.24–$47.98**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****432.14**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Great****38%**
top-5 click share — an open shelf
**Growth**
**Good****+28.6%**
90-day search growth — must beat 0% to launch
**Brand share**
**Okay****76%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Okay****2.2%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$30K**
$30K/yr · 51K searches
**Returns**
**Bad****12.0%**
return rate — above 5% kills the launch gate
**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, baby shark costume adults is a $30K/yr Amazon United States market (51K searches/yr). The top 5 brands hold 76% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 47/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **baby shark costume adults market data**
- **Units sold / yr**
- **1K–1K**
- avg 0–100/product
- **Revenue / yr**
- **$27K–$34K**
- units × avg price
- **Conversion rate**
- **2.2%**
- **Avg BSR**
- **#17,216**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **93%**
- **Out of stock**
- **13.4%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **176 days**
## **Competition & brand share**
Clicks spread well past the top 5 (38% combined) — an open shelf where new products get seen.
**Brands**
**23 **▲rising
**Sellers**
**32**
**Top-5 brand share**
**76%**
Top 20: 98%
**Top-5 click share**
**38%**
Top 20: 82%
**Open market**
**19%**
- Generic40% - vavalad13% - Markest10% - dressfan8% - Poptrend5% - HSCTEK5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +28.6% search growth over the last 90 days.
6K4KSpike '24Prime Day '25Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct · busiest ÷ quietest = 13.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/baby-shark-costume-adults/trend)
## **Top baby shark costume adults search terms**
- **baby shark costume adult**15K/yr+32.2%2.2% conv. - **baby shark inflatable costume**4K/yr+36.2%1.4% conv. - **baby shark adult costume**6K/yr+37.1%2.8% conv. - **baby shark inflatable**3K/yr+60.5%0.8% conv. - **adult baby shark costume**4K/yr-2.4%2.1% conv. - **daddy shark costume**11K/yr-5.1%0.0% conv. - **daddy shark costume adult**7K/yr-50.7%4.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/baby-shark-costume-adults/search-terms)
## **Top baby shark costume adults 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%3%$9106%$2K9%$3K12%$4K1101001K10K 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**inflatable costume adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (Rose Red)**Generic**$20.89**4.6★117 rev](https://www.amazon.com/dp/B0F5Q752BL) [2**dressfan Animal Shark Onesie Cosplay Costume Christmas Halloween Pajamas for Unisex Adults Teens Kids Rose M**dressfan**$20.36**4.4★1,459 rev](https://www.amazon.com/dp/B07ZJK8CF5) [3**Inflatable Costume Adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (YELLOW)**Generic**$21.16**4.1★8 rev](https://www.amazon.com/dp/B0FT2TCPVC) [4**Markest Onesie Unisex Adult Pajamas Animal Rose Red Shark Cosplay Costume Sleepwear L**Markest**$24.10**4.4★1,882 rev](https://www.amazon.com/dp/B07V7D654F) [5**inflatable costume adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (Yellow)**Generic**$20.82**4.6★117 rev](https://www.amazon.com/dp/B0F5Q8SFGZ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Inflatable Costume Adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (YELLOW)**Generic**$21.16**8 rev9mo ago](https://www.amazon.com/dp/B0FT2TCPVC) [**Inflatable Costume Adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (BLUE)**Generic**$23.35**8 rev9mo ago](https://www.amazon.com/dp/B0FT2PW1GF) [**Inflatable Costume Adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (ROSE RED)**Generic**$21.56**8 rev9mo ago](https://www.amazon.com/dp/B0FT2RVPVQ) [**WEQJC Adult Onesie Pajamas Halloween Costume One-Piece Slim Fit Sleepwear Cosplay Suit for Mens Womens(Hammerhead Shark Large)**WEQJC**$15.73**194 rev1y ago](https://www.amazon.com/dp/B0FF25DP6L) [**Poptrend Couples Inflatable Shark Costume for Adults Funny Halloween Blow Up Costumes His and Hers Cosplay Duo Costumes 2 Packs**Poptrend**$45.97**88 rev1y ago](https://www.amazon.com/dp/B0F66PSQJJ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Inflatable Costume Adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (ROSE RED)**Generic**$21.56**4.1★**▲ 404%**](https://www.amazon.com/dp/B0FT2RVPVQ) [**Infant Shark Bunting Costume - Hooded Bunting with Fin-Shaped Sleeves and Soft Sculpted Eyes**Fun Costumes**$39.43**5.0★**▲ 397%**](https://www.amazon.com/dp/B0BT385BFZ) [**JUOLOET Unisex Adult Onesie Pajamas Shark Animal One Piece Snug Fit Halloween Costume Sleepwear Homewear Shark Small**JUOLOET**$29.97**4.6★**▲ 381%**](https://www.amazon.com/dp/B0DZCQV1QQ) [**inflatable costume adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (Rose Red)**Generic**$20.89**4.6★**▲ 360%**](https://www.amazon.com/dp/B0F5Q752BL) [**WEQJC Adult Onesie Pajamas Halloween Costume One-Piece Slim Fit Sleepwear Cosplay Suit for Mens Womens(Hammerhead Shark Large)**WEQJC**$15.73**4.5★**▲ 346%**](https://www.amazon.com/dp/B0FF25DP6L)
**~~View all trending →~~**
## **What buyers say about baby shark costume adults**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**22%
*“Great quality costume”*
**Size-Overall**15%
*“fits well,”*
**Fun/Entertainment Experience**13%
*“It's fun for the whole family”*
**Value For Money**8%
*“Great costume at a fantastic price”*
**Advertised Vs Actual Product**7%
*“Better than expected”*
**Comfort-Overall**6%
*“It is so comfortable”*
**Durability**5%
*“Good quality, durable”*
**Ease Of Use**4%
*“Easy to put on and fill, and literally fits all shapes and sizes”*
**Inflation/Deflation**3%
*“Very easy to pit on and inflate”*
**Warmth**2%
*“warm”*
### **What buyers complain about **
**Size-Overall**14%
*“Short”*
**Durability**11%
*“Rips easily and my daughter didnt even get a full 24 hrs without it ripping”*
**Strap/String Quality**9%
*“the leg straps on the inside broke”*
**Zipper Quality**5%
*“Broken zipper”*
**Height**5%
*“not for all heights”*
**Instructions/User Manual/Troubleshooting**5%
*“reading instructions ahead of time”*
**Product Condition**5%
*“This has clearly been used”*
**Warmth**5%
*“Heads up, it gets very hot”*
**Quality-Overall**5%
*“Looked cheap”*
**Advertised Vs Actual Product**4%
*“I wish they depicted these features”*
### **Top return reasons **
**Size-Overall**58%
**Length**9%
**Advertised Vs Actual Product**4%
**Product Condition**3%
**Value For Money**3%
**Material Quality**2%
**Inflation/Deflation**2%
**Arm Fit**2%
**Color**1%
**Quality-Overall**1%
## **Common questions**
- **Is baby shark costume adults profitable to sell on Amazon United States?**
- The niche generates $30K/yr across 43 tracked products. 0 of 7 products launched in the last 360 days are still selling. 90-day search growth is +28.6%. Flapen's verdict: Skip it (47/100).
- **How competitive is the baby shark costume adults niche?**
- 23 brands and 32 sellers compete. The top 5 products take 38% of clicks and top 5 brands hold 76% of demand.
- **What do buyers complain about in baby shark costume adults?**
- Top complaints mined from reviews: Size-Overall, Durability, Strap/String Quality. The return rate is 12.0% — above our launch gate.
- **When does demand for baby shark costume adults peak?**
- Demand peaks in Sep–Oct; the busiest month runs 13.1× the quietest.
- **What does it cost to enter the baby shark costume adults niche?**
- Listings span $15.24–$47.98; the average listing price is $27.35 (sweet spot $15–$100). The average incumbent carries 432 reviews — the moat a new listing must climb.
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