Spottedfin sand cichlid

Where they come from

Spottedfin sand cichlids (Xenotilapia spilopterus) are Tanganyikan sand-dwellers. Think wide, open sandy flats with scattered shells and rocks, gentle slopes, and clear, mineral-heavy water. They are built for sifting sand all day, and their whole vibe in the aquarium makes more sense once you picture that.

Setting up their tank

Give them footprint, not height. These fish use the bottom like a runway, and they get stressed if they cannot spread out. A 4-foot tank is where they start acting natural, especially if you want a group. Bigger is just easier.

• Tank size: 75g (4-foot) as a comfortable starting point for a small group, larger if mixing with other Tanganyikans
• Substrate: fine sand (not sharp). They sift constantly and you will see them spitting sand through their gills
• Decor: keep most of it open. Use rock piles at the ends or back corners, leave a big sandy middle
• Filtration: strong and stable. They like clean water, but not a washing machine of flow on the sandbed
• Water: hard, alkaline Tanganyika-style. Stable beats chasing numbers

I like to run a prefilter sponge on the intake because sand finds a way into everything. Also, keep the sandbed fairly shallow (about 1-2 inches). Deep sand in a Tanganyika tank tends to trap junk unless you are really on top of maintenance.

What to feed them

In the tank they do best on small foods that make sense for a sand-sifter: tiny crustaceans, insect larvae, and quality prepared foods that sink. They are not the fish I try to "train" onto only big pellets. You will get better bodies and better behavior with smaller, frequent meals.

• Staples: quality sinking micro pellets and small granules
• Frozen: cyclops, mysis (chopped if large), brine shrimp, daphnia
• Occasional: live foods if you have a clean source (great for conditioning breeders)

If you keep them with faster midwater fish, watch that your Xenotilapia are actually getting fed. I target-feed with a turkey baster sometimes, or I drop food into a couple spots so the group can pick without competing with the whole tank.

How they behave and who they get along with

Spottedfins are more "nervous elegant" than "tough cichlid." They are social and look best in a group, but they also have a pecking order. You will see little sand-hovering disputes and short chases, mostly over space.

• Best kept as a group: aim for 6+ if the tank size allows, so aggression spreads out
• Tankmates: other Tanganyikans that are not hyper-aggressive and do not live on the same patch of sand
• Avoid: bulky brawlers (many Mbuna-type attitudes in a Tanganyika tank), and anything that constantly bullies the bottom

Good companions are usually calm rock-dwellers that stick to their piles (some Julidochromis, some Altolamprologus) and peaceful open-water fish that do their own thing. I am cautious with very boisterous Cyprichromis if the tank is tight, because the constant motion can keep sand cichlids on edge. In a roomy tank its usually fine.

Breeding tips

They are mouthbrooders, and the breeding dance is classic Tanganyika sand cichlid stuff: display, quiver, little circles over a chosen patch of sand. If they settle in, you will see a female (or sometimes the male, depending on the exact pairing and behavior you observe) carrying a mouthful and refusing food.

• Start with a group and let pairs form instead of trying to buy a "pair"
• Condition with small frozen foods and frequent water changes
• Keep the tank calm during holding. Spooks lead to premature spitting
• If you pull the holder, move her gently and give a quiet tank with dim light and hiding breaks (not tight caves)

If you want to raise fry, a separate grow-out with the same water chemistry is your friend. Newly released fry take small foods right away - baby brine shrimp and powdered foods work well. Keep it clean and do small, frequent water changes rather than big swings.

Common problems to watch for

• Bloat and wasting: often from overfeeding, rich foods, or stress from bullying
• Mouth and lip damage: usually coarse substrate or constant sparring in cramped quarters
• Hiding and skittish behavior: too little open sand, too much flow, too much activity from tankmates, or not enough numbers
• Sudden deaths after "nothing changed": Tanganyikans hate instability - watch for temperature swings, missed maintenance, or a filter slowdown
• Jumping: uncovered gaps around hoses and lids

The biggest success lever with Xenotilapia spilopterus is giving them a calm, spacious sand zone and keeping the routine steady. Once they settle, they are addictive to watch - that constant sand-sifting and the little social dramas never get old.