tcgrate
  1. tcgrate
  2. Games
  3. Yu-Gi-Oh!
  4. Sets
  5. Structure Deck: Fury from the Deep
  6. Mermaid Knight

Yu-Gi-Oh! · Structure Deck: Fury from the Deep · #SD4-EN011 · Common

Mermaid Knight

Yu-Gi-Oh! card price for Mermaid Knight: $0.49 market, from $0.36 at the cheapest listing, 1st Edition printing, updated Oct 18, 2026. Full price history since Feb 8, 2024 below.

Market price · 1st Edition · Oct 18, 2026
$0.49
0.0% this week · 0.0% in 30 days
Buy on eBay →
1 day0.0%
7 days0.0%
30 days0.0%
90 days−3.9%
1 year−2.0%
All time+14.0%

Sellers right now

$0.36lowest listing$19.81highest
Market price$0.49
Mid listing$0.62
30-day avg$0.49

Market price is what a near-mint copy actually sold for. The cheapest listing is what a seller asks today — on thin markets the two differ a lot.

Where to buy

TCGplayer$0.49

One year

$0.4852-week low$0.6252-week high
In the range7%
All-time low$0.40
All-time high$0.70
First priceFeb 8, 2024
1st Edition · market price
$0.39$0.50$0.62$0.73
$0.49
Feb 2024Dec 2024Nov 2025Oct 2026
TCGplayer market price · via tcgcsvtcgrate.com

Price story

We have tracked Mermaid Knight since February 2024, when it sold for $0.43. Today the market price is $0.49, up 14.0%. Across the past year it went −2.0%, with a low of $0.48 and a high of $0.62; today it sits near the bottom of that range. The highest price we have recorded is $0.70, 42.9% above today. Listings currently start at $0.36; over the last 30 days the market price averaged $0.49.

Printings

PrintingMarketLowHigh7d
1st Edition$0.49$0.36$19.810.0%

The card in play

ATK1500
DEF700
Card type
Effect Monster
Attribute
WATER
Monster type
Aqua
Card text

Effect: As long as Umi remains face-up on the field, this card can attack twice during the same Battle Phase.

Other printings of Mermaid Knight

2 more · $0.49 – $8.83
All printings
Mermaid Knight (DR2-EN137), Dark Revelation Volume 2 — Yu-Gi-Oh! card price 0.0% 7d Mermaid Knight Dark Revelation Volume 2 · #DR2-EN137 $8.83 Mermaid Knight (AST-025), Ancient Sanctuary — Yu-Gi-Oh! card price −2.1% 7d Mermaid Knight Ancient Sanctuary · #AST-025 $1.43

Also in Structure Deck: Fury from the Deep

most valuable
Full set
Tribe-Infecting Virus (SD4-EN007), Structure Deck: Fury from the Deep — Yu-Gi-Oh! card price +2.6% 7d Tribe-Infecting Virus Structure Deck: Fury from the Deep · #SD4-EN007 $10.15 Pot of Greed (SD4-EN018), Structure Deck: Fury from the Deep — Yu-Gi-Oh! card price −0.5% 7d Pot of Greed Structure Deck: Fury from the Deep · #SD4-EN018 $4.39 Ocean Dragon Lord - Neo-Daedalus (SD4-EN001), Structure Deck: Fury from the Deep — Yu-Gi-Oh! card price −1.2% 7d Ocean Dragon Lord - Neo-Daedalus Structure Deck: Fury from the Deep · #SD4-EN001 $4.04 Heavy Storm (SD4-EN019), Structure Deck: Fury from the Deep — Yu-Gi-Oh! card price +2.1% 7d Heavy Storm Structure Deck: Fury from the Deep · #SD4-EN019 $3.85