flounder costume baby
Skip itA small market ($14K/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$30.32avg listing price — sweet spot $15–$100
Price range
Great$9.14–$68.92cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good698.71avg incumbent reviews — the moat a new listing must climb
Competition
Good51%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Growth
Bad-2.4%90-day search growth — must beat 0% to launch
Returns
Bad8.6%return rate — above 6% kills the launch gate
Market size
Bad$14K$14K/yr · 206K searches
Conversion
Bad0.2%search→purchase rate — share of searches ending in a sale
Competition
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.Brands
18 rising
Sellers
37
Top-5 brand share
83%
Open market
13%
- Fun Costumes56%
- Frietlebird12%
- vavalad6%
- v285%
- IBTOM CASTLE4%
- Disguise4%
- Open — no brand owns it (12 brands, 13%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 34 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Fun Costumes Disney Adult Flounder Costume Little Mermaid Halloween Yellow Fish Dress for Men and Women Large/X-Large
Fun Costumes$67.474.3★87 rev
Fun Costumes Disney The Little Mermaid Flounder Infant Halloween Cosplay Ocean Beach Theme Party & Dress Up 12/18 Months
Fun Costumes$33.074.7★356 rev
Disney Flounder Costume Dress Toddlers 4T
Fun Costumes$38.964.1★20 rev
Frietlebird My First Halloween Baby Girl Outfit Toddler Flounder Costume Long Sleeve Romper with Tutu Skirt Infant Halloween Costumes (A-Yellow 12-18 Months)
Frietlebird$17.874.7★23 rev
vavalad Adult Loose - fitting Onesie Costume Halloween Christmas Cosplay Funny Costume Women Men
vavalad$34.354.6★285 rev
Newest
by launch date
tagunop Womens Tulle Skirts High Low Layered Puffy Fairy Skirt Mini Party Costume Irregular Adults Tutus Black S
tagunop$19.38279 rev
Mieeyali Halloween Newborn Baby Boy Girl Clothes Crab Crawfish Costume Gender Neutral Bodysuit Romper Sea Outfit (Orange 9-18 Months)
Mieeyali$15.8133 rev
Frietlebird My First Halloween Baby Girl Outfit Toddler Flounder Costume Long Sleeve Romper with Tutu Skirt Infant Halloween Costumes (A-Yellow 12-18 Months)
Frietlebird$17.8723 rev
Frietlebird Baby Girl Halloween Outfit Baby Flounder Costume Long Sleeve Romper with Tutu Skirt Sets Infant Halloween Costumes (A-Yellow 3-6 Months)
Frietlebird$18.5723 rev
Frietlebird My First Halloween Outfit Girl Baby Flounder Costume Long Sleeve Romper with Tutu Skirt Sets Infant Halloween Costumes (A-Yellow 6-12 Months)
Frietlebird$19.0523 rev
Trending
90-day click momentumtagunop Womens Tulle Skirts High Low Layered Puffy Fairy Skirt Mini Party Costume Irregular Adults Tutus Black S
tagunop$19.384.4★
vavalad Adult Loose - fitting Onesie Costume Halloween Christmas Cosplay Funny Costume Women Men
vavalad$34.354.6★
Alaroo Shiny Fish Scale Mermaid Leggings for Women Pants Green M
Alaroo$16.034.2★
Frietlebird My First Halloween Outfit Girl Baby Flounder Costume Long Sleeve Romper with Tutu Skirt Sets Infant Halloween Costumes (A-Yellow 6-12 Months)
Frietlebird$19.054.7★
Nicute Sparkly Sequin Skirt Fringe Skirt Belly Dance Hip Scarf Mermaid Costume for Women (Light Blue)
Nicute$10.964.0★
Demand & seasonality
Weekly Amazon search volume, last 79 weeks — -2.4% search growth over the last 90 days.Peak months: Aug, Sep, Oct · busiest ÷ quietest = 24.9×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“surprisingly well made”
“fits well”
“Beautiful colors”
“These were a fun gift for my daughter who played flounder in the high school play”
“Best costume - great material”
“Lightweight doesnt hurt in an hour”
“So cute and kept my baby warm”
“So cute and soft and easy to put on over clothes”
“Sparkle”
“Breathable fabric”
What buyers complain about
“these may be short on you”
“Innacurate description”
“It was not what I expected as far as color”