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Black Ghost Knifefish at Sea Cave Inc.

Freshwater Fish

Black Ghost Knifefish.

A velvety-black, ribbon-bodied fish that glides backward and forward on a single rippling fin and navigates by a weak electric field. It grows large — plan on a 100-gallon-plus tank — and wants caves, dim light, and peaceful tankmates it can't swallow.

$49.99A species we carry

Live fish are priced per supplier batch — prices may vary. Call to confirm current pricing.

Condition
new
Fulfillment
Local pickup — Erie, PA

Every animal is acclimated and health-checked in-house before it reaches the sales floor. This is a species we carry — it's most likely in the tanks around delivery days, but live stock changes daily. Please call (814) 456-9445 to confirm availability before you drive in.

Care at a glance

What to know before you take one home.

Care level
Advanced
Temperament
Semi aggressive
Community
Semi community
Adult size
20"
Min tank size
100 gallons
Diet
Carnivore
Scientific name
Apteronotus albifrons

Good tank mates

Semi-aggressive and a nighttime hunter, the black ghost knifefish needs calm tankmates that are too big to fit in its mouth but not so boisterous that they outcompete it for food. Think medium peaceful fish like larger gouramis, bigger tetras such as Congo tetras, angelfish, or peaceful South American cichlids. Avoid tiny fish like neons and ember tetras (they get eaten), fin-nippers, and other aggressive or territorial knifefish. This is not a fish for a small peaceful nano community.

Good to know

The black ghost knifefish navigates and finds food using a weak electric field it generates, which lets it hunt in the dark.

Stock and individual temperament vary — call (814) 456-9445 for pairing advice before you buy.

Visit the store

660 East 14th Street,
Erie, PA.

Mon–Fri 12–6 · Sat 11–4 · Sun closed. Call ahead on livestock — what's on the floor rotates.