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 $99.00!*

$9.95 FLAT RATE FOR LESS THAN $99.00 - CANADA AND LOWER 48 US WIDE!

*EXCEPTIONS:

• Light Bulbs over 36" are shipped at a flat rate of $9.95. No quantity Limit. You can ship one or one hundred bulbs for the same price (valid for both Canada and the US).
• 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 do our best to 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.

Aquarium Equipment Returns

• All returns and/or exchanges must be made within 14 days of receipt of product.
• Products may only be returned unused, and in original unopened packaging.
• J&L Aquatics reserves the right to charge a non-refundable 20% restocking charge for any/all returned merchandise (excluding exchanges).
• J&L Aquatics will not be responsible for return shipping charges. Original shipping charges are non-refundable. If the item was originally shipped under our free shipping policy, the cost of doing so will be removed from the credit. Before returning/exchanging any goods, we require that you authorize your return with J&L Aquatics. Any items returned without our authorization will be declined.
• In the event that your order is damaged by the carrier, a claim will be filed with the carrier company. Upon approval of the claim by the carrier, your original order will be re-shipped to you at no additional cost. If you wish to return the damaged goods for a refund or credit, the 20% restocking charge will be applied. J&L Aquatics will not be held responsible for any/all shipping delays that may occur from time to time.
• Special order & sale items are not returnable under any circumstances.
• Dry Good Order cancellations may also be subject to a 20% restocking charge.
• Orders that are returned or refunded when using Affirm or similar financing are subject to a 5% service charge of the original order amount including tax.