Threadfin Lookdown
The Threadfin Lookdown, sometimes known as the Lookdown, is best known for how thin it is, and its bright, shimmering blueish-silver scales which are highly reflective.
A 125 gallon or larger aquarium with peaceful tank mates, particularly those that are not fin nippers, is necessary.
The diet of the Threadfin Lookdown consists of meaty foods and occasional live items.
| Approximate Purchase Size | Size Range |
|---|---|
| Small | 1″ to 2-1/2″ |
| Medium | 2-1/2″ to 4″ |
| Large | 4″ to 6″ |
| X-Large | 8″ to 12″ |
FAQ
What kind of tank size is recommended for a Threadfin Lookdown?
A 125 gallon or larger aquarium is recommended for a Threadfin Lookdown.
What should I feed my Threadfin Lookdown?
The Threadfin Lookdown eats meaty foods and occasional live items.
Are there any tank mates that should be avoided?
Fin nippers should be avoided as they may harm the Threadfin Lookdown’s delicate fins.

Joanne Bell –
The Threadfin Lookdown is a stunning addition to my aquarium. Its shimmering blueish-silver scales reflect light beautifully. I’ve kept it in a 150-gallon tank with peaceful community fish, and it’s very active without causing any aggression. Feeding it meaty foods like brine shrimp and bloodworms works well.
Rose Pullman –
It’s a visually striking fish with a slender build. I noticed it’s more active during the day and prefers the middle to upper levels of the tank. I feed it a mix of meaty foods and a few live items weekly. It’s not a strong swimmer, so it does best in a spacious tank with stable water conditions.
Trevor Davidson –
The fish looks amazing and adds a lot of visual interest. I’ve had it for three months now and it’s still healthy and active. I make sure to avoid any fish with long fins or aggressive tendencies. It’s a great choice for a peaceful, low-maintenance display.