Silver-cheeked toadfish

Where they come from

Silver-cheeked toadfish (Lagocephalus sceleratus) are Indo-Pacific puffers that have spread hard into the Mediterranean via the Suez Canal. They're open-water rovers that cruise reefs, sand flats, and drop-offs looking for crunchy food. In the wild they get big, bold, and opportunistic, which pretty much sums up what they'll do in your fish room too.

Setting up their tank

I'll be blunt: most home aquariums are the wrong tool for this fish long-term. They grow large, they move a lot, and they have the jaw power to rearrange your plans in one bite. If you're still set on keeping one, think more like "public-aquarium-style predator system" than a reef tank.

• Tank size: think several hundred gallons minimum for an adult. Bigger is not a luxury here - it is the difference between a manageable fish and a stressed missile.
• Filtration: heavy skimmer, oversized mechanical filtration, and room for frequent water changes. They are messy eaters and put out serious waste.
• Flow and oxygen: strong circulation and lots of surface agitation. They handle current fine and it helps keep water quality stable.
• Aquascape: keep it simple. Open swimming space with a few big, stable structures. Avoid delicate rock stacks - they will bump and bite.
• Substrate: optional. Bare bottom is your friend for cleaning. If you do sand, go coarse and be ready to vacuum it often.
• Lid: tight-fitting and heavy. Puffers can jump, and this one has the muscle to push lids around.

I like to run a big prefilter sponge on the intake and clean it constantly. It catches the chunks they spit out. If you let that stuff rot in the system, the tank will smell like regret fast.

What to feed them

They are built to crush. The goal is meaty foods with enough hard stuff to wear the teeth down, without turning the tank into a nitrate factory. Expect them to beg like a dog and act starving even when they're not.

• Staples: shrimp (shell-on when possible), clams, mussels, crab pieces, squid, marine fish flesh in rotation.
• For teeth: whole shellfish (clam/mussel on the half shell), small crabs, shrimp with shell. This helps slow down beak overgrowth.
• Occasional: quality carnivore pellets for big marine predators (some individuals take them, some never do).
• Avoid: freshwater feeder fish, fatty oily scraps, and anything questionable from the bait shop unless you trust the source.

Vitamin-soak isn't a bad habit if your diet leans heavy on frozen. Also, keep an eye on tooth growth. If you stop offering hard foods, the beak can overgrow and then you're looking at sedation and trimming, which is not a fun DIY project with this species.

How they behave and who they get along with

They're bold, smart, and they test everything with their mouth. Some individuals act almost "curious" and calm, right up until they decide a heater cord or a tankmate looks chewable. I treat them as a single-specimen fish.

• Temperament: opportunistic predator, high bite risk.
• Reef safe: no. They will eat crustaceans, snails, urchins, and sample corals while hunting.
• Tankmates: generally a bad idea. Anything smaller will be eaten, anything similar size can be harassed or bitten, and slow fish get their fins clipped.
• Best "tankmate": none. If you must, only consider very large, fast, tough fish in an enormous system, and accept that it can still go sideways.

They also get bored. In big systems I've had luck giving them sturdy objects to investigate (large smooth PVC pieces, big shells). It doesn't tame them, but it can cut down on them obsessing over plumbing and cords.

Breeding tips

Realistically, breeding in home aquariums is not a common or practical goal. They are pelagic spawners in the wild, with eggs and larvae that need specialized rearing setups and live foods. On top of that, sexing adults is not straightforward, and keeping a compatible pair without injuries is its own challenge.

Common problems to watch for

• Tooth overgrowth: happens if you feed only soft foods. Provide shell-on foods and watch their mouth shape over time.
• Water quality crashes: they are messy and big. Rising nitrate, oily surface film, and detritus buildup show up fast if maintenance slips.
• Ich and marine parasites: they can get the usual saltwater stuff. Quarantine is worth the effort because treating a giant puffer in a display can be a nightmare.
• Bite damage and self-injury: they can smash into decor when startled and can injure tankmates (or themselves) in tight spaces.
• Equipment chewing: cords, airline tubing, and even silicone edges can get tested. Protect or route anything soft out of reach.
• Puffing events: stress can trigger inflation. Avoid chasing with nets. Use containers for transfers and keep handling to a minimum.

If you take anything from this: give it huge water volume, feed like a predator keeper (controlled, not sloppy), and treat it like a fish that can hurt you and anything else in the tank. They're impressive, but they demand respect every single time you open the lid.