Exclamation Mark Tetra

Bryconella pallidifrons

Exclamation Mark Tetra is a peaceful middle-to-top swimmer. Keep in a school of at least 8.

PeacefulMiddle to top swimmerKeep in a school of at least 8Intermediate

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Need help with Exclamation Mark Tetra?

Explore compatibility, care or problems using this guide and your aquarium’s conditions.

Quick facts

Adult size: ≤ 0.9" (≤ 2.3 cm)
Aquarium size: 26 US gal (100 L) or larger
Care level: Intermediate
Temperament: Peaceful
Swimming zone: Middle to top swimmer
Temperature: 77–81°F (25–27°C)
pH: 6–7.5
GH: 5–10 dGH
KH: 2–4 dKH
Diet: Omnivore
Lifespan: up to 5 years
Group behavior: Keep in a school of at least 8

Care requirements

Care level: Intermediate.

Lifespan: up to 5 years.

Aquarium size and space needs

Minimum aquarium size: 26 US gal (100 L) or larger. Plan the layout and stocking within that limit.

Water parameters

Suitable water: temperature 25–27 °C, pH 6–7.5, GH 5–10 dGH, KH 2–4 dKH.

Temperament and compatibility

Exclamation Mark Tetra is peaceful and suits calm community fish.

Swimming zone and behavior

This fish uses the middle to upper part of the aquarium, so leave enough open swimming space for movement and feeding.

Feeding

As an omnivore, Exclamation Mark Tetra should receive a varied diet rather than one repeated food type.

Before adding this fish

Plan for an aquarium of 26 US gal (100 L) or larger.
Make room for its social group.
Avoid aggressive or highly competitive fish.
Keep in a school of at least 8.
Offer a varied diet suited to this species’ documented feeding habits.

Natural habitat and origin

Origin: Brazil, Colombia.

Important notes

Biological size evidence combines male/unsexed SL and female TL; do not silently collapse to one adult-size number.
Species-specific captive social group, aquarium minima, water preference and exact KH remain poorly documented.

Similar fish profiles

Use these profiles to compare fish with similar care level, size, temperature range, or swimming behavior.

Black-belt Tetra Hemigrammus kuroobi Same family Similar care level Same temperament Beginner – Intermediate ≤ 2" (≤ 5 cm) 75–82°F (24–28°C) Blue Tetra Tyttocharax cochui Same family Similar care level Same temperament Beginner – Intermediate ≤ 0.8" (≤ 2 cm) 73–79°F (23–26°C) Apricot Tetra Dectobrycon armeniacus Same family Similar care level Same temperament Intermediate ≤ 2.6" (≤ 6.6 cm) 75–82°F (24–28°C) Black Arrow Royal Tetra Inpaichthys luizae Same family Similar care level Same temperament Beginner – Intermediate ≤ 1.6" (≤ 4 cm) 72–79°F (22–26°C) Black Heart Tetra Hyphessobrycon copelandi Same family Similar care level Same temperament Beginner – Intermediate ≤ 1.6" (≤ 4 cm) 75–82°F (24–28°C) Black Line Tetra Hyphessobrycon scholzei Same family Similar care level Same temperament Beginner – Intermediate ≤ 1.6" (≤ 4 cm) 72–82°F (22–28°C)

FAQ

How large does Exclamation Mark Tetra get?

Exclamation Mark Tetra reaches ≤ 0.9" (≤ 2.3 cm).

What aquarium size does Exclamation Mark Tetra need?

Use an aquarium of at least 26 US gal (100 L) or larger.

Is Exclamation Mark Tetra peaceful?

Yes. Exclamation Mark Tetra is recorded as peaceful and is best planned with calm community fish that do not harass it or dominate the feeding area.

What temperature is suitable for Exclamation Mark Tetra?

Keep it between 25 to 27 °C.

Should Exclamation Mark Tetra be kept alone or in a group?

Exclamation Mark Tetra: Keep in a school of at least 8.