Can Altum Angel and Electric Blue Crayfish Live Together?

Altum Angel is a moderately assertive species (5/10), while Electric Blue Crayfish is semi-aggressive (8/10). This modest difference means Electric Blue Crayfish may occasionally assert dominance over Altum Angel.

In terms of spatial distribution, Altum Angel prefers the Middle (Open Water) zone, whereas Electric Blue Crayfish occupies the Bottom (Substrate) zone. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.

Additional behavioural considerations to keep in mind: Aggressive fish may bully and stress shy, slow-moving species. Hyperactive swimmers can stress shy, slow-moving species through constant motion. Two territorial species may clash over territory, especially in smaller tanks.

Worth noting: Electric Blue Crayfish is a known jumper, so a tight-fitting lid is essential.

There is no temperature overlap between Altum Angel (27–32°C) and Electric Blue Crayfish (18–25°C). This fundamental mismatch makes long-term cohabitation impractical.

Both fish can tolerate a pH between 6.5 and 6.5. Maintaining a stable value within this band is more important than hitting an exact number.

Hardness requirements are incompatible: Altum Angel needs 1–5 dGH while Electric Blue Crayfish requires 6–15 dGH.

To house Altum Angel and Electric Blue Crayfish together, plan for an aquarium of at least 400 litres with a minimum length of 120 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.

Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.

Specific environmental needs for this combination include: Sand (Sifters), Driftwood (Digestion/Hiding), Leaf Litter/Blackwater, Plants - Floating. Meeting these requirements will help both species thrive.

Both species do well with low (still water) water movement, so a standard filtration setup rated for the tank volume should suffice.

Altum Angel and Electric Blue Crayfish are the kind of pair that can look acceptable in a shop but become a maintenance problem at home. The main risk is not a single number in the chart; it is the way incompatible behavior, water needs, or pressure on space compounds over time once both fish are established in the same tank.