Longspine drum

Where they come from

Longspine drum (Umbrina analis) are sciaenids from the eastern Pacific - think Southern California down into Baja and the Gulf of California. In the wild they hang around sandy bottoms and eelgrass beds where they can hunt and rummage, and they are pretty comfortable in cooler, oxygen-rich water compared to your typical tropical reef fish.

Setting up their tank

This is an expert-level fish mostly because of size, waste output, and temperament. They need room to turn and cruise, and they do best in a tank that feels like a wide open beach with structure on the edges.

• Tank size: big footprint beats tall. I would not bother under 300 gallons for an adult, and bigger is honestly better.
• Filtration: oversized skimmer, lots of bio media, and strong mechanical filtration you can clean often. They eat messy foods and make it obvious.
• Flow and oxygen: moderate flow but very high aeration. Good surface agitation is your friend.
• Substrate: sand. They are a sand-and-bottom fish and will act weird on bare glass long term.
• Rockwork: keep it to the sides and back so the fish has open lanes. Make sure nothing can topple if the fish bumps it.
• Cover: a tight lid. Drums can spook and launch.

For parameters, keep salinity stable (around normal seawater), keep ammonia and nitrite at true zero, and keep nitrate as low as your system realistically allows. These fish are less forgiving of "it looks fine" water than people expect, mostly because they are large carnivores and the tank can swing fast after heavy feedings.

What to feed them

They are predators that want meaty, marine-based foods. The goal is to get them onto a varied rotation so you are not stuck relying on one food that disappears from the store for a month.

• Staples: chopped shrimp, squid, clam, mussel, marine fish flesh (not freshwater feeder fish).
• Frozen options: quality marine predator blends, mysis for smaller individuals, chopped krill sparingly (fatty).
• Live foods: can help new arrivals start eating (live ghost shrimp or marine-origin crustaceans if you can get them), but I try to transition off live as soon as possible.
• Supplements: soak a couple meals a week in a vitamin/HUFA supplement if you are feeding lots of plain seafood chunks.

Feeding schedule depends on size. Juveniles can take smaller meals more often. Adults do fine with fewer, larger meals, but do not turn the tank into a landfill. If you see food hit the sand and sit, you fed too much or too fast.

How they behave and who they get along with

Longspine drums are bold once settled, but they are still prey-minded when something surprises them. They also have the classic drum/croaker vibe: they can be a bit moody, and they do not tolerate being bullied.

• General behavior: bottom-oriented cruiser that patrols open areas and investigates sand.
• Territory: can get pushy in tight quarters, especially as they size up.
• Reef safety: not a reef fish. Expect it to eat crustaceans and anything it can fit in its mouth.
• Tankmates: large, sturdy temperate fish that are not fin-nippers and not small enough to become lunch.

I have had the best results keeping them either solo or with a carefully chosen short list of big, calm fish. Aggressive brawlers stress them out, and fast nippy fish can shred fins and keep them hiding. Give them their space and they become a lot more visible.

Breeding tips

Breeding in home aquariums is not something you should plan around. These are large marine fish with seasonal cues in the wild, and you would likely need a very large system and a mature pair (or group) with temperature and photoperiod cycling to even have a shot.

Common problems to watch for

• Temperature and oxygen issues: warm water plus a big carnivore equals low oxygen and stress. You will see heavy breathing and lethargy.
• Shipping damage and refusal to eat: new arrivals can be beat up and shy. Dim the lights, offer scent-heavy foods (clam works well), and give them time.
• External parasites: marine ich and velvet can hit hard. Quarantine is worth the hassle with a fish this expensive to replace in time and effort.
• Fin damage from tankmates or tight decor: they need open swim space and non-nippy neighbors.
• Nutritional problems from a narrow diet: feeding only one seafood (like just shrimp) can lead to long-term issues. Rotate foods and add vitamins/HUFA.
• Water quality swings after big feedings: ammonia spikes in under-filtered systems, nitrate creep, and dirty sand beds.

If you are set on keeping a longspine drum, plan for the adult from day one: big footprint, temperate temps, heavy filtration, and simple aquascape. Do that, and they are actually pretty straightforward - just not forgiving.