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Inside Capital Exotic Fish shop

D.C.'s only home
for nano fish, shrimp
& aquascaping.

Today
Address
3404 Idaho Ave NW
Livestock & UNS restocked!

Aquascaping is the art of arranging aquatic plants, stone, and driftwood inside a tank to create a living underwater landscape: part garden, part painting.

I try to express in the aquarium the scenery of nature that deeply moves me.

Takashi Amano · creator of the Nature Aquarium · 1954–2015
Our goal isn’t simply selling fish, it’s community engagement: providing a place to go and helping people discover a hobby they'll love for years.
Murray & Jake, owners

Every animal in the building has been carefully acclimated, observed, and fed in our system. We'd rather lose a sale than send a fish home to die.

Years on Idaho Ave
3
Gallons on display
2,200+
Loyal customers
10,000+

A shop built to
stay in.

White floors, custom-built wood racks, and walls that actually got some thought. CEF doesn't look like most fish stores, and it's not meant to.

The Chill Zone has a blue sofa, which is not something you'll find in the chain stores. Good for adults who want to browse without being rushed. Great for kids who need somewhere to sit while the grown-ups pick out their pleco.

Inside Capital Exotic Fish

Everything
in the building.

A wide selection of aquatic animals, plants, and hardgoods. Come in and see what's here.

A shoal of rainbowfish catching the light among driftwood and green plants in a brightly lit planted aquarium.

Community & Nano Fish

The freshwater staples alongside the tiny rarities. Neons, rasboras, and danios next to ember tetras and celestial pearl danios, quarantined before they hit the floor.

A close-up of Hygrophila pinnatifida, its lobed olive-and-bronze leaves layered over a piece of dark driftwood in a planted aquarium.

Aquatic Plants

50+ live species: from carpeting Monte Carlo to background val. Trimmed and restocked each week.

The shrimp rack: two tiers of small planted tanks, each under a hand-lettered sign naming the variety: Blue Dream, Orange Sunkist, Red and Black Crystal, Red and Black Galaxy.

Shrimp & Invertebrates

From bright gold Neocaridina and snow white Amanos, to micro crabs and rabbit snails.

A red male betta with fully spread fins hovering among green plants in a planted display tank.

Bettas

Crowntails, halfmoons, and plakats, each in their own display tank. We don't sell cups.

A dwarf cichlid hovering over an algae-covered rock, its flank spangled with iridescent blue, the dorsal fin edged in yellow and the tail edged in orange.

Rare Catfishes & Cichlids

L-numbers and CW-numbers, alongside Apistogramma and Geophagus. The tanks you stop at every visit to see what's new.

A nano rimless aquascape on a white retail shelf, a pale rock arrangement set into a green carpet under an RGB LED bar.

UNS Aquaria & Equipment

Rimless tanks from 5 to 120 gallons. Filters, lights, stands, Controsoil, and Controbase. The same gear we spec for every custom build.

Built here,
ready to take home.

Every scape on the floor was put together in this building. Hardscape set by hand, planted, then left to run until the water is stable. By the time one carries a price tag it has been cycling for weeks. What you carry out is a finished, living piece of art, waiting on nothing but its new inhabitants.

  1. Cristina holds a tissue-culture cup up to the light and studies the plant sealed inside it.
    01Set by hand
  2. Nick works at the open rim of the discus display aquarium, red, orange and turquoise discus gathered in the water beside his hands.
    02Aquascaped by expert staff
  3. A row of small aquascaped tanks for sale on a white shelf under bright LED lighting, one priced in pink marker on the glass reading five hundred dollars, aquascaped by Dennis Wong.
    03Ready to go home

Buy a betta
without the guilt.

Not a cup in sight. Every male here has his own filtered UNS tank, planted and changed weekly, and that tank is temporary housing. It holds him until somebody takes him home.

  • A staff member leaning in to inspect the betta display, rows of individual planted nano tanks on open shelving, with the lit retail tank wall behind.
    The tanks

    No cups. Not one.

    Every male gets his own filtered UNS tank, planted, with a water change every week. Nothing here is sitting in a jar of still water waiting to be noticed.

  • A copper-red betta marbled with dark patches, fins fanned, swimming to the right of an otherwise empty pale background.
    The color

    The whole range, not one shelf's worth.

    Crowntails, halfmoons and plakats, male and female. Marbles, solids, koi patterns, and scales that throw a different color depending on where you're standing.

  • A wild-type male betta hanging in mid-water among java fern and driftwood, his dark body spangled with iridescent blue-green scales and his fins striped in pale blue.
    A small wild-type female betta poised above a rock ledge in a planted tank, her dark flank dotted with rows of turquoise, her fins short and clear.
    The wild types

    Bettas you can keep in pairs.

    Unlike domestic hybrids, many wild types like B. mahachaiensis hold together peacefully: a pair, or a small group, in one planted tank.

Start them in a UNS 5N: hardscape, plants, somewhere to hideCome meet them →

How we keep
water moving.

From a 5-gallon shrimp bowl to a 120-gallon planted display. We handle scapes, weekly maintenance, water testing and special plant sourcing. We still answer the phone ourselves.

1
Aquarium Installation
Full design and build, 10 to 800 gallons. We handle aquascaping, filtration, lighting and stocking.
2
Maintenance Visits
Weekly, bi-weekly or monthly. House and business calls. Free quote.
3
Custom Aquascaping
Dutch, Iwagumi, biotope, paludarium. Hardscape, planting, and 50+ live plant species sourced in-house. On-site consultation and build.
4
Water Testing
Free in-store water testing: ammonia, nitrite, nitrate, and pH. Bring a sample any time, no appointment needed. Also included with every maintenance visit.
5
Sourcing & Special Orders
Tank-raised discus, rare dwarf cichlids, high-end catfish, wild bettas, nano fish, ornamental shrimp, and 50+ plant varieties. Looking for something specific? We have the supplier relationships.

After closing, the shop reopens.

A few evenings a year the register goes quiet, the chairs come out, and the floor belongs to whoever has something worth showing. Some nights that's us. Some nights it's a club, or a hobbyist who's known worldwide for what they can do.

Jonathan gives a presentation on blackwater aquatic systems

Talks & demos

One subject, worked through properly, by someone who keeps the tank they're describing. Cycling, water chemistry, CO2, plant selection, whatever the room turns up asking about.

Jake explains aspects of the nature aquarium

Hands-on workshops

Small groups around a bare tank. Hardscape, substrate, planting, and the trimming nobody warns you about. You leave having done it rather than having watched it.

In the room with the hobby.

We're a small shop, but we show up. Donations, auction prizes, speakers, and classroom kits. The DC and Maryland fish community is the reason this shop exists, so we try to make it stronger when we can.

Jonathan walks a community member through our tissue culture offerings at the Maryland Aquarium Hobbyist Event 2026
Talking Plants At The Maryland Hobbyist Event
Clubs & partners
  • ASCMAquarist Society of Central Maryland
  • GWAPAGreater Washington Aquatic Plant Association
  • CCACapital Cichlid Association
  • PVASPotomac Valley Aquarium Society
  • MAHMaryland Aquarium Hobbyists
Bring us into your club →

A truly local
fish store.

Potomac River Living · September 2026

The neighborhood magazine put Murray on its September cover and gave the shop the story inside: a father and son hobby that turned into a storefront, the Chill Zone sofa nobody gets rushed off of, the clubs and classrooms we donate to, and the two dogs who greet you at the door.

We are the fish store for Cathedral Heights, the Palisades, and everyone who drives in from farther out. Being written up by the people who live here is the version of that we are proudest of.

Read the cover story
Potomac River Living, September 2026: Murray Liebman on the cover in front of the shop's tanks
A navy cap embroidered with the Capital Exotic Fish logo, worn with the blue staff polo that carries the same crest.
TheHat
Shop merchandise on a rack: a light blue tee printed with the Capital Exotic Fish fish-in-a-frame logo, navy and white mesh caps stacked behind it, planted tanks and the plant rack on either side.

Take the shop home.

Made in small batches, sold from the front counter, never online. If you see one in the wild, the wearer probably has opinions about RO water.

  • 1
    Mesh Hat
    Navy or white with breathable mesh and the shop's iconic peacock bass.
  • 2
    The Tee
    A soft sky-blue tee to show everyone you get your fishes from people who care.
  • 3
    Stickers
    Sized for a water-bottle, a laptop, or the corner of a 75-gallon.
Sold in-shop onlyCome grab one →

Drop by
the shop.

Bring a water sample, a picture of your tank, or just a Saturday afternoon. Street parking on Idaho and New Mexico. A short walk from Tenleytown or the Glover Park bus lines.

Hours
Mon12 – 7 pm
TueClosed
WedClosed
Thu12 – 7 pm
Fri12 – 7 pm
Sat11 am – 7 pm
Sun11 am – 7 pm