Boxfish are typically available in a very small size, however their growth potential is spectacular. They require suitably large aquariums to give them enough room to swim comfortably. We recommend boxfish only be kept by very experienced aquarists. Because of the boxfish's lack of mobility they are prone to being nipped on by other fish, which could prove disastrous. Boxfish contain a toxin, pahutoxin, which may be released into the water when the fish is stressed. When concentrated, pahutoxin may cause a frothing effect in the water. Within the confines of the aquarium this toxin, which is invisible, may become concentrated enough to damage the gills of every other fish in the aquarium, potentially causing death. If not corrected in time it may also cause the death of every other animal in the aquarium. For this reason boxfish should never be kept with any fish who may bother them, including groupers, angelfish, damsels, and any fish who may chase or bite them.

If it is suspected the water is poisoned a large water change should be conducted immediately and fresh carbon added. Other fish should be removed to a separate aquarium with new water. Boxfish have some resistance to their own toxin, however it can still injure them and it is possible for microfauna in the aquarium to die, creating an ammonia spike. Sudden lighting changes or other surprises may also stress the fish enough to cause toxin release.

Boxfish are typically peaceful towards all other fish. They are very personable and can learn to feed from their owner’s fingers. They are omnivores which may feed on many types of sponges, tunicates, worms, bivalves, and corals. They feel most secure when they have a cave or two to hide in, as well as plenty of open space for swimming. Caves should be large enough that so the boxfish can swim in and out comfortably. Diet should include plenty of high quality meaty items, marine algae, Spirulina, half shell clams, krill and Mysis shrimp. Boxfish should be fed at least 3 times a day. Never feed floating food or the boxfish may ingest air and develop buoyancy issues.

The Yellow boxfish is a delightful animal commonly available from Bali. Its bright lemony yellow body is cube shaped and covered in black polka dots randomly scattered all over. When fully grown it may become a more earthy color. Its tiny mouth is puckered as though it is permanently making a kissy face. Males and females are identical. It grows to 17.5 inches; we recommend an aquarium of at least 180 gallons.

FREE SHIPPING OVER $119!*

- does not apply to livestock -

$11.99 FLAT RATE FOR LESS THAN $119.00 - CANADA WIDE!

*EXCEPTIONS:

• Any heavy or bulky items will incur a 100% charge of the actual shipping cost (valid for both Canada and the US). Heavy bulky items include (but are not limited to): salt, dry rock, sand, chillers, sumps, aquariums, stands, and some filter media.
• Frozen or perishable food can only be shipped via UPS Express. We have discounted the express shipping of these items to help the hobbyist out.
• Livestock is covered by a different shipping policy. To view the policy and further information regarding shipping livestock, click here.

GENERAL NOTES:

• We always make our best effort to ship your order via the carrier chosen during the check-out process; however, for some multi-piece shipments and/or remote destinations, we must reserve the right to use another carrier at our discretion (and without prior notice). If you require notice of any changes made to the carrier, please mention it in the special instructions during check-out.
• Upon request, we will ship your dry goods as per your specifications (courier, airlines, on your account, etc.).
• Quoted rates are the carriers live discounted shipping rates after adjusting for any/all shipping promotions.

Return Policy — Aquarium Equipment & Supplies

• All returns and/or exchanges must be made within 30 days of receipt of product.
• Before returning or exchanging any goods, you must contact J&L Aquatics to obtain a Return Merchandise Authorization (RMA). Items returned without prior authorization will be declined.
• Returned items must be unused, in original packaging, in as-new condition, and in perfect sellable condition. All returns are subject to inspection upon receipt.
• A 15% restocking fee applies to all online returns. This fee includes the cost of outbound shipping.
• Customer is responsible for return shipping costs on standard returns.
• Order cancellations made before shipping are not subject to a restocking fee.

Non-Returnable Items

• Special order items
• Clearance / final sale items
• Open box items

Regular sale items (non-clearance) are returnable within the 30-day return window, subject to our standard return conditions.

Defective, Warranty & DOA Items

• If you receive an item that is defective, not working, or dead on arrival (DOA), please contact us as soon as possible.
• Confirmed defective and warranty returns have no restocking fee and no Affirm fee. Customer does not pay return shipping — J&L Aquatics will provide a prepaid return label.
• All defective claims are subject to inspection. Items showing signs of customer damage, improper installation, or misuse are not covered under warranty.

Carrier Damage & Lost in Transit

• If your order arrives damaged by the carrier or is lost in transit, please contact us right away with:Photos of the damaged product (if applicable)Photos of the damaged box/packaging (if applicable)A description of the issue
• Important — Do not throw out any packaging! Please keep all original packaging, boxes, and packing materials. These are required to process your claim. Discarding packaging may affect our ability to resolve your claim.

High-Value Items ($100+)

• For items valued at $100 or more, customers must provide a return tracking number before a replacement will be shipped.

Affirm & Financing Orders

• Affirm or similar financing orders that are cancelled or returned in-store are subject to a 5% service charge. This covers the processing fee charged to us by the financing provider.
• The Affirm service charge does not apply to confirmed defective or warranty returns.