How could we forget our mermen! I’ll admit, this blog is centered around mermaids but Mermen are a big part of the Mer-community too. You might be reading this post to get inspired for a mermaid parade, or Halloween party. Either way, check out these merman, or mermaid man costumes for your upcoming event.
merman costumes
A mermaid man costume can have many different layers. Let’s start with the basics.
merman briefs
These little merman briefs work great depending on what you are going for. Great for parades, under leggings and even swimming.
[asa2_img img=”1″ size=”LargeImage” width=”500″ height=”500″ align=”center” show_title=”no” show_button=”no”]B07GJGC7C8[/asa2_img]mermaid man costume leggings
I really like the brand Mertailor, they have a lot of options for mermen! Make sure to use the discount code: Molly10 for 10% off!
[asa2_img img=”2″ size=”LargeImage” width=”323″ height=”500″ align=”center” show_title=”no” show_button=”no”]B01K2MTAP6[/asa2_img]Getting a specific “merman” costume tail is hard online but the good thing there are plenty of “mermaid” tails to choose from. I recommend this one below as most mermaid tail skirts tether at the knees and it would be hard to walk.
From there, the accessories are all yours! Go crazy!
King Triton and King Neptune Costumes
King triton is pretty easy but you have to be creative with accessories. Get a walking tail skirt, white wig (with beard) and a triton staff. King Neptune is a Roman God but still water themed if you don’t like the idea of a tail.
[asa2_img img=”2″ size=”LargeImage” width=”251″ height=”500″ align=”center” show_title=”no” show_button=”no”]B074FYC3S1[/asa2_img]poseidon costume
Are you dressing up with a special mermaid? You can be the Greek God Posiden who rules all the waters of the earth.
[asa2_img img=”1″ size=”LargeImage” width=”500″ height=”500″ align=”center” show_title=”no” show_button=”no”]B005IGA6SW[/asa2_img]Aquaman costume
YES! I love this Marvel charachter! Super quick way to get rock hard abs, great hair, and rocking tattoos!
[asa2_img img=”1″ size=”LargeImage” width=”189″ height=”500″ align=”center” show_title=”no” show_button=”no”]B01BSEQKIM[/asa2_img]The shape of water costume
Did you see this movie? So sweet. You could even swim with this mask on and get some fun reactions.
[asa2_img img=”1″ size=”LargeImage” width=”500″ height=”500″ align=”center” show_title=”no” show_button=”no”]B07F2S82NT[/asa2_img]mermaid man and barnacle boy costume
I had NO IDEA who these were before writing this post. Mermaid man and barnacle boy are fictional characters off of the show Spounge Bob Square Pants. If you have kids you probably know who these guys are.
This is my human costume
Not huge on costumes? I get you! A basic T-shirt works if you don’t want to get all gussied up!
[asa2_img img=”2″ size=”LargeImage” width=”500″ height=”468″ align=”center” show_title=”no” show_button=”no”]B076P6B7TZ[/asa2_img]Mermaid security shirt
Maybe you have a bunch of “little mermaids” you need to take trick-or-treating. Wear a mermaid security shirt and keep those cuties in line.
[asa2_img img=”2″ size=”LargeImage” width=”500″ height=”468″ align=”center” show_title=”no” show_button=”no”]B07FDHDHDK[/asa2_img]King Triton Shirt
What do you think of this shirt? Super cleaver if you are not super into dressing up. Plus you get an automatic beard and merman abs.
Prince Eric costume
Ok ok… I know this isn’t a merman costume at all but I thought maybe a guy would be searching online trying to find a costume to pair up with a mermaid. Impress her by going as prince Eric! She will love it!
[asa2_img img=”1″ size=”LargeImage” width=”187″ height=”500″ align=”center” show_title=”no” show_button=”no”]B003VLWWOC[/asa2_img]Let me know which one you choose and which event you are going too!












John M Welsh
July 27, 2025I have been asked to play MerClaus this x-mas. Was wondering if you could help me with a costume.