Needlespine coral goby
Gobiodon acicularis
The Needlespine coral goby features a slender body, bright green-yellow coloration, and prominent, elongated dorsal fins.
This page includes AI-generated images. Why am I seeing AI images?
About the Needlespine coral goby
A tiny coral-dwelling goby that perches among branching SPS corals and can be nearly jet-black to brown. It is the only Gobiodon with a filament-like first dorsal spine, which looks wild when it flicks it while displaying.
Also known as
Quick Facts
Size
3.9 cm SL
Temperament
Peaceful
Difficulty
Intermediate
Min Tank Size
10 gallons
Lifespan
2-4 years
Origin
Western Pacific (Indonesia to Palau and northeastern Australia)
Diet
Omnivore-microcarnivore - small meaty foods (mysis, enriched brine shrimp, copepods); may also graze coral mucus and pick at tiny inverts
Water Parameters
24-26°C
7.9-8.3
Need a heater for this species?
This species needs 24-26°C in a 10 gallon tank. Use our heater calculator to find the right wattage.
Calculate heater sizeCare Notes
- Great for nano reefs 10+ gallons; give lots of branching structure (ideally branching SPS) so it can perch and feel secure.
- Hold temperature at 24-26 C and pH at 7.9-8.3 in marine conditions; stability matters for this tiny reef fish.
- Feed small meaty foods it can swallow: mysis, enriched brine shrimp, and copepods; it may also graze coral mucus and pick at tiny inverts, so provide varied prepared foods.
- Peaceful temperament, so choose gentle, small tankmates that will not outcompete it at feeding time.
- Expect it to sit among branching SPS and sometimes nip mucus, which can reduce polyp extension where it perches; plan coral placement with that in mind.
- Color ranges from nearly jet-black to brown; you can ID it by the unique filament-like first dorsal spine that it flicks while displaying.
- Lifespan is about 2-4 years; keeping it well fed and stress-free helps it reach the upper end.
Compatibility
Good Tankmates
- Small, peaceful clownfish that ignore perchers (e.g., ocellaris/percula) in nano reefs
- Firefish/dartfish and other calm midwater nano fish that will not harass or outcompete it (e.g., Nemateleotris spp.)
- Shrimp-goby pairs that stay near the sand (e.g., Stonogobiops or Amblyeleotris with pistol shrimp) - different niche from coral perchers
- Small, peaceful blennies and similar-size perchers (e.g., tailspot blenny, barnacle blennies) with adequate rockwork
- Reef-safe cleanup crew and ornamental shrimp that are not predatory (e.g., cleaner/peppermint shrimp, snails, tiny hermits)
- Branching SPS corals for perching (Acropora, Seriatopora, Pocillopora) - provide multiple healthy colonies; expect some polyp nipping
Avoid
- Aggressive or predatory fish that target tiny benthic fish (dottybacks, hawkfishes, larger wrasses like sixline, combative damsels)
- Large or very boisterous fish (tangs, triggers, big angels, groupers) that outcompete or stress nano gobies, especially in small tanks
- Predatory invertebrates that can seize small fish (mantis shrimp, large crabs, coral banded shrimp)
- Multiple clown gobies or other Gobiodon in small tanks - territorial unless a confirmed pair with ample branching coral
The Needlespine coral goby (Gobiodon acicularis) is a tiny coral-dwelling marine goby from the Western Pacific. It spends its days perched among the branches of small-polyp stony corals, showing colors from nearly jet-black to deep brown. Look closely and you will see its giveaway feature: a filament-like first dorsal spine that it flicks during displays.
Quick facts: size up to 3.9 cm SL; lifespan 2-4 years; peaceful temperament; care level intermediate; minimum tank 10 US gallons; temperature 24-26 C; pH 7.9-8.3; omnivore-microcarnivore diet.
Origin and natural habitat
Western Pacific: Indonesia to Palau and northeastern Australia. In nature, this species lives among branching SPS corals, perching within the thicket for shelter and darting only short distances. That close coral association is a big part of how it behaves in aquaria.
Aquarium setup and water conditions
A single Needlespine coral goby can be kept in a stable nano reef of 10 gallons or more. Build in plenty of branch-like structure so it has perches and tight spaces to feel secure. If you keep live branching SPS, expect the fish to spend most of its time nestled among the branches.
- Temperature 24-26 C; pH 7.9-8.3; stable marine conditions.
- Provide branching hardscape or live SPS for perching and cover.
- Gentle to moderate flow with sheltered nooks inside the branches.
- Keep nutrients and cleanliness appropriate for a reef tank to support this small, sedentary fish.
This species may graze coral mucus and repeatedly sit on the same SPS branches. That can lead to local polyp retraction or irritation. Give it multiple perching options, and be ready for some interaction with branching SPS if you keep them.
Diet and feeding
Gobiodon acicularis is an omnivore-microcarnivore that takes small meaty fare. Offer tiny foods it can swallow whole and feed modest portions rather than large dumps of food.
- Mysis shrimp (small/finely chopped)
- Enriched brine shrimp (as a supplement, not the sole diet)
- Copepods and other zooplankton-sized items
New arrivals often respond best to moving foods. Start with live or frozen items and transition to your routine offerings. Several small feedings suit this nano fish and reduce competition from faster eaters.
Behaviour and tankmates
Peaceful and perch-oriented, this goby is not a distance swimmer. It spends long periods sitting among branches and may display by flicking its distinctive needlespine. Choose gentle tankmates that will not bully or outcompete it for tiny foods.
- Good companions: other small, calm reef fish that ignore perch sites.
- Avoid: large, boisterous, or aggressive species that may harass a sedentary nano fish.
- Be cautious with very small invertebrates; this species may pick at tiny inverts while foraging.
Common problems and how to avoid them
- Food competition: In mixed reefs, it can be outpaced at mealtimes. Target feed with a pipette and offer multiple small feedings.
- Coral irritation: Constant perching on the same SPS branch can annoy the coral. Provide several branching structures so the fish rotates its resting spots.
- Small-tank instability: As a nano species, it feels parameter swings quickly. Keep temperature and pH within the given ranges and maintain stable, reef-quality water.
Similar Species
Other marine peaceful species you might be interested in.
Banggai Cardinalfish
Pterapogon kauderni
Banggai cardinals just sort of hover like little underwater satellites, and the bold black bars with those long, polka-dotted fins look unreal under reef lighting. They're super chill most of the time, but once a pair forms you'll see real "fish drama," and the male will even mouthbrood the babies like a champ.
Bicolored foxface
Siganus uspi
A Fiji native with a sharp two-tone look, the bicolored foxface is half deep brown and half yellow with a crisp line between. It spends the day grazing algae and can snap into a mottled camouflage when spooked; those tall dorsal spines are venomous, so other fish usually keep their distance.
Blackfin slatey
Diagramma melanacrum
A large sweetlips from Southeast Asian reefs with a pale silvery-yellow body sprinkled in dark spots and distinct black pelvic and anal fins. Juveniles linger in silty shallows, while adults rest in small groups on deeper reef walls by day and roam at night to pick off crabs, shrimp, and other invertebrates.
Blackspot razorfish
Iniistius dea
This is one of the coolest "knife-bodied" wrasses - it hangs over open sand and, when it gets spooked or wants to sleep, it literally torpedoes straight into the sand. Give it a deep, fine sand bed and it will act totally different (and way more natural) than a typical rock-hugging reef wrasse. Adults are usually shy and cruisy with tankmates, but they are not forgiving about rough handling or sketchy setups.
Blueband goby
Valenciennea strigata
This is that classic gold/yellow-headed sand-sifting goby with the little blue cheek stripe-always busy, always rearranging your sandbed. In a reef tank it'll spend the day taking mouthfuls of sand, filtering out tiny critters/foods, then "snowing" clean sand back out, and it'll usually claim a burrow area (often as a pair in the wild). It's super cool behavior-wise, but you really do need a mature tank with a proper sandbed and a lid because they can jump.
Bristletail Filefish (Aiptasia-Eating Filefish)
Acreichthys tomentosus
This little weirdo is one of my favorites because it's got that goofy filefish "face," a knack for wedging itself into rockwork, and a ton of personality once it settles in. People love them for the chance they'll snack on nuisance Aiptasia, but even when they're not on pest patrol they're just fun to watch cruise around and pick at stuff all day.
More to Explore
Discover more marine species.
Blackspotted snake eel
Quassiremus ascensionis
A tropical marine snake eel that buries in soft substrates (sand/mud/gravel) with only the head exposed to ambush prey. Recorded to 71 cm TL and occurs mainly in the western Atlantic (also Brazil) and at Ascension Island; typically found in shallow inshore habitats to ~12 m, including sand and seagrass (turtle grass) areas.
Blue blanquillo
Malacanthus latovittatus
A long, slim tilefish with a bold black side stripe and a blue head that fades down the body. It hovers high above the reef and darts back to a sand-rubble burrow, often living as a monogamous pair; in tanks it is fast, jump-prone, and will eat small crustaceans and tiny fish.
Blue Green Chromis (Green Chromis)
Chromis viridis
Blue Green Chromis are those shimmery little green-blue darts you'll see zipping around the top of a reef tank, always looking like they're catching the light just right. They're super fun in a group because they hover and cruise together, but they've got a bit of a "pecking order" thing going on if the tank's tight or the group's too small.
Blueline demoiselle
Chrysiptera caeruleolineata
A little reef damsel with a bright electric-blue line riding over a yellow body, it tends to live deeper on rubble slopes and hugs the bottom in small groups. In aquariums it prefers dimmer light, plenty of rock cover, and frequent small feedings of planktony foods; males guard eggs stuck to the substrate.
Bluespotted angelfish
Chaetodontoplus caeruleopunctatus
A medium Pomacanthid from the Philippines, it has a dusky body dusted with tiny electric-blue spots and a yellow tail. In the wild it browses sponges and tunicates on deeper reefs, so it thrives only in mature tanks with lots of live rock and frequent feedings.
Bluespotted dottyback
Pseudochromis persicus
A striking dark-bodied dottyback covered in tiny blue spots from the Persian Gulf and nearby western Indian Ocean reefs. It grows larger than most dottybacks and throws a lot of attitude for its size, staking out caves and defending them hard. Best for roomy marine setups with robust tankmates and plenty of rockwork to break lines of sight.
Looking for other species?