Vogelkop river garfish

Where they come from

Vogelkop river garfish are halfbeaks from the Bird's Head Peninsula of West Papua, Indonesia. Think clear, slow forest streams and calm river margins with overhanging branches and lots of insect life. They hang right under the surface and pick off anything that lands there.

Setting up their tank

They live at the surface and want horizontal space more than height. A 36-inch long tank is the minimum I would use for a small group, and 40 gallons gives you some breathing room.

• Footprint - long tank, tight-fitting lid with every gap covered
• Flow - gentle. They dislike strong currents slamming them into glass
• Scape - open surface lanes with floating plants like Salvinia or water sprite, plus some emergent wood or stems
• Substrate - whatever you like; they barely use the bottom. Keep it clean
• Lighting - moderate. Dappled shade from floaters makes them bolder

Water-wise, they do best once the tank is fully mature. Aim for 75-82 F, pH around neutral to slightly alkaline, and some minerals in the water. If your tap is very soft, add a bit of crushed coral or a mineral mix so the KH and GH are not near zero.

Acclimate slowly with lights off. I drip for 45-60 minutes and keep a lid over the bucket. They panic-jump during netting, so use a specimen box, not a net.

What to feed them

They are surface hunters. If food sinks, they ignore it. Start with live or frozen to get them eating, then work in prepared foods once they calm down.

• Live or frozen: mosquito larvae, small crickets, fruit flies, Daphnia, baby brine shrimp, chopped bloodworms
• Prepared: high-quality floating pellets or sticks, insect-based flakes crumbled to stay at the top
• Feeding style: small portions 2-3 times daily so they do not have to compete with midwater fish

How they behave and who they get along with

Expect surface cruising, quick dashes, and some jaw-to-jaw sparring from males. It looks dramatic but is normal. What they cannot handle is constant harassment or being outcompeted for food.

• Group: best as 1 male with 2-4 females, or a larger group with multiple males only in a long tank so aggression spreads out
• Good tankmates: peaceful bottom and midwater fish that do not crowd the surface, like Corydoras, kuhli loaches, small peaceful tetras or rasboras, Stiphodon gobies
• Use caution: small rainbows or blue-eyes can be too zippy at the surface and steal every bite
• Avoid: fin nippers, barbs, big cichlids, gouramis that lurk at the top, hatchetfish, and anything likely to grab those beaks

Breeding tips

These are livebearing halfbeaks. Males have a modified anal fin called an andropodium used for mating. A well-fed female will drop a small batch of fry about once a month once settled.

• Setup: dense floating plants and fine-leaved stems near the surface give fry places to vanish
• Ratios: 1 male per 2-4 females cuts down on nonstop chasing
• Catching fry: adults may eat newborns. I watch in the morning, then move fry to a grow-out box
• Feeding fry: baby brine shrimp, microworms, and finely sieved Daphnia from day one

Common problems to watch for

• Beak injuries from glass, nets, or filter parts. Keep surfaces smooth, use specimen containers, and sponge intakes
• Jumping. Any sudden shadow or slam of a door can launch them. Tight lid, always
• Starving in community tanks. If they look thin behind the head, feed separately and float food right in front of them
• Shipping parasites. De-worming with a gentle internal parasite protocol right after quarantine has saved me a lot of grief
• Mouth fungus on scrapes. Tidy water and a targeted antibacterial work well if you catch it early
• Ammonia spikes. They hate new tanks. Cycle fully, keep nitrates low, and change water steadily, not in giant swings