Industrial metal warning sign with a black, red, and white design. A red oval at the top reads "WARNING" in bold white. Center text states "THIS PROPERTY IS PROTECTED BY A HIGHLY TRAINED MERMAID" with "MERMAID" in large red font. Features a black silhouette of a mermaid with flowing hair and tail. Bottom text reads "NOT RESPONSIBLE FOR INJURY OR POSSIBLE DEATH." Professional aluminum sign shown with pre-drilled holes for wall mounting in a clean finish.
a distressed wooden sign with a mermaid silhouette, mounted on a wall above a wooden table.
Industrial metal warning sign with a black, red, and white design. A red oval at the top reads "WARNING" in bold white. Center text states "THIS PROPERTY IS PROTECTED BY A HIGHLY TRAINED MERMAID" with "MERMAID" in large red font. Features a black silhouette of a mermaid with flowing hair and tail. Bottom text reads "NOT RESPONSIBLE FOR INJURY OR POSSIBLE DEATH." Professional aluminum sign shown with pre-drilled holes for wall mounting in a clean finish.
Industrial metal warning sign with a black, red, and white design. A red oval at the top reads "WARNING" in bold white. Center text states "THIS PROPERTY IS PROTECTED BY A HIGHLY TRAINED MERMAID" with "MERMAID" in large red font. Features a black silhouette of a mermaid with flowing hair and tail. Bottom text reads "NOT RESPONSIBLE FOR INJURY OR POSSIBLE DEATH." Professional aluminum sign shown with pre-drilled holes for wall mounting in a clean finish.
Industrial metal warning sign with a black, red, and white design. A red oval at the top reads "WARNING" in bold white. Center text states "THIS PROPERTY IS PROTECTED BY A HIGHLY TRAINED MERMAID" with "MERMAID" in large red font. Features a black silhouette of a mermaid with flowing hair and tail. Bottom text reads "NOT RESPONSIBLE FOR INJURY OR POSSIBLE DEATH." Professional aluminum sign shown with pre-drilled holes for wall mounting in a clean finish.
a metal sign with a textured surface, with one side appearing shiny and the other side appearing wet. The text above the image reads "Premium Aluminum Metal Signs", and below it, "UV-Protected - Rustproof - Weather-Resistant".
three rectangular aluminum sign sizes, ranging from 9x12 inches to 16x24 inches.
two different finishes of a sign, one clean and one distressed, with the text "CHOOSE YOUR FINISH" and "Available in two distinct looks" above them.
three different sizes of square aluminum sign sizes, ranging from 6x6 inches to 12x12 inches.
two different mounting styles, one with holes and one without holes, allowing the user to choose their preferred mounting style.
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Industrial metal warning sign with a black, red, and white design. A red oval at the top reads "WARNING" in bold white. Center text states "THIS PROPERTY IS PROTECTED BY A HIGHLY TRAINED MERMAID" with "MERMAID" in large red font. Features a black silhouette of a mermaid with flowing hair and tail. Bottom text reads "NOT RESPONSIBLE FOR INJURY OR POSSIBLE DEATH." Professional aluminum sign shown with pre-drilled holes for wall mounting in a clean finish.a distressed wooden sign with a mermaid silhouette, mounted on a wall above a wooden table.Industrial metal warning sign with a black, red, and white design. A red oval at the top reads "WARNING" in bold white. Center text states "THIS PROPERTY IS PROTECTED BY A HIGHLY TRAINED MERMAID" with "MERMAID" in large red font. Features a black silhouette of a mermaid with flowing hair and tail. Bottom text reads "NOT RESPONSIBLE FOR INJURY OR POSSIBLE DEATH." Professional aluminum sign shown with pre-drilled holes for wall mounting in a clean finish.Industrial metal warning sign with a black, red, and white design. A red oval at the top reads "WARNING" in bold white. Center text states "THIS PROPERTY IS PROTECTED BY A HIGHLY TRAINED MERMAID" with "MERMAID" in large red font. Features a black silhouette of a mermaid with flowing hair and tail. Bottom text reads "NOT RESPONSIBLE FOR INJURY OR POSSIBLE DEATH." Professional aluminum sign shown with pre-drilled holes for wall mounting in a clean finish.Industrial metal warning sign with a black, red, and white design. A red oval at the top reads "WARNING" in bold white. Center text states "THIS PROPERTY IS PROTECTED BY A HIGHLY TRAINED MERMAID" with "MERMAID" in large red font. Features a black silhouette of a mermaid with flowing hair and tail. Bottom text reads "NOT RESPONSIBLE FOR INJURY OR POSSIBLE DEATH." Professional aluminum sign shown with pre-drilled holes for wall mounting in a clean finish.a metal sign with a textured surface, with one side appearing shiny and the other side appearing wet. The text above the image reads "Premium Aluminum Metal Signs", and below it, "UV-Protected - Rustproof - Weather-Resistant".three rectangular aluminum sign sizes, ranging from 9x12 inches to 16x24 inches.two different finishes of a sign, one clean and one distressed, with the text "CHOOSE YOUR FINISH" and "Available in two distinct looks" above them.three different sizes of square aluminum sign sizes, ranging from 6x6 inches to 12x12 inches.two different mounting styles, one with holes and one without holes, allowing the user to choose their preferred mounting style.

Highly Trained Mermaid Warning Sign

Swim at Your Own Risk

Price:
$19.95
Sign Size: 9x12 in
Style: Clean, New Look
Add Holes?: With Holes
  • Free U.S. shipping over $50
  • Ships in 1–3 business days
  • Easy 30-day returns
  • Tracking included on every order
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Pickup available at 25 Maple Street

Usually ready in 2-4 days

Description

This Highly Trained Mermaid warning sign shows a mermaid with flowing hair and tail under a red WARNING oval, with the fine print “Not Responsible for Injury or Possible Death.” It’s printed directly on rust proof aluminum for a pool fence, dock, or beach house wall.

Are mermaids real? No, though sailors reported them for centuries. When Christopher Columbus sailed near Hispaniola in 1493, he wrote of three mermaids that were not as beautiful as painted. Historians believe he saw manatees.

Can it hang by a pool or the ocean? Yes. Rust proof aluminum with a UV coating suits pool fences, docks, and beach houses. Rinse it with fresh water now and then if it gets splashed with salt water or pool water.

Product Details

• Full sign text: “Warning: This Property Is Protected by a Highly Trained Mermaid. Not Responsible for Injury or Possible Death.”
• Black, red, and white design with a flowing haired mermaid silhouette
• Printed directly on heavy gauge aluminum, never a decal that peels in humidity
• UV protective coating for full sun by the water
• Rust proof for pools, docks, and coastal porches
• Slightly rounded corners and a lightweight build

Size & Finish Options

• Rectangle sizes: 9×12, 12×18, and 16×24 inches
• Square sizes: 6×6, 8×8, and 12×12 inches
• Finishes: Clean, New Look for crisp poolside contrast, or Distressed, Wood Look for a weathered boathouse feel
• Mounting: with or without pre-drilled holes, on every size
• Starting at $14.95

Packaging & Shipping

Every sign ships flat in a rigid fiberboard mailer or a heavy duty box to prevent bending. Orders are printed in Henniker, NH and leave the studio within 1 to 2 business days. Standard shipping by USPS Ground is free on US orders of $50 or more and $5.95 on smaller orders. Need it sooner? Choose USPS Priority Mail or Priority Mail Express at checkout. Every order includes tracking, and local customers can pick up at our Henniker studio.

Perfect For

Pool fences and cabanas, docks and boathouses, beach house decor, mermaid themed bathrooms, and lake cottages. It’s a funny mermaid gift for swimmers, boaters, and anyone who still checks the deep end for tails.

Made With Care

Every sign is made to order and handled with special care from printing to packing. Want different wording or a custom size? Email us and we’ll do our best to make it happen.

Complete Your Collection

Pair it with the Highly Trained Manatee Metal Sign, the Mermaid Relaxing in a Bathtub Art Print, or the Mermaid Reading Among Jellyfish Art Print, and find more in our Outdoor & Patio Signs.

© Designs by Linda Nee LLC

Frequently Asked Questions

Our metal signs are printed directly onto heavy-duty aluminum (no decals or stickers involved), giving them a durable, rust-proof finish. Each sign is proudly made in the USA at our studio in Henniker, New Hampshire.
Yes! Our metal signs are designed to withstand outdoor elements and feature a UV protective coating, making them ideal for both indoor and outdoor display for years to come.
Most of our signs are available with pre-drilled mounting holes for easy hanging. If you'd prefer no holes, we offer that option as well – just select it when ordering.
Metal signs can be cleaned easily with a standard glass cleaner and a soft cloth to keep the print looking bright and clear.
In many cases, yes! If your specific vehicle, pet breed, or detail isn't listed, choose the closest matching sign. If the product page has a customization field above the "Add to Cart" button, enter your details there and we'll personalize it for you. If there's no customization field on that listing, email us with your details and we'll let you know if we can accommodate your request.
For most walls, a 9x12 in or 12x18 in sign works well as a focal point, while 16x24 in and larger suit bigger walls or garage doors. Smaller 6x6 in or 8x8 in sizes are popular for mailboxes, gates, or gift-sized pieces — check the size chart on each listing for exact placement guidance.
With their UV-protective coating and rustproof aluminum construction, our signs are built to stay vibrant outdoors for years through sun, rain, and snow without fading, cracking, or rusting.

Handcrafted in NH

Premium quality designed and produced in our New Hampshire studio

Secure Packaging Guaranteed

Every item is hand-inspected and securely packed to prevent damage during transit

100% Satisfaction Guarantee

Dedicated support to ensure you love your purchase

Made to Order, Just for You

Every piece is custom-imprinted after you order — never mass-produced off a shelf

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