🐠 Engineer Goby (Pholidichthys leucotaenia)
Sleek Black-and-White Striped Juveniles Mimicking a Venomous Catfish • Barred, Secretive Adults • A Dedicated Tunnel-Building Burrower
 
📋 The Engineer Goby, also called the Convict Blenny or Convict Goby, is neither a true goby nor a blenny; it belongs to its own unique family, Pholidichthyidae. Juveniles are sleek black with a bold white stripe, mimicking the venomous Striped Eel Catfish for protection from predators, while adults develop an irregular pattern of cream or white bars and become considerably more secretive.
It comes from the west-central Pacific, from the Philippines to the Solomon Islands, inhabiting shallow lagoons and coastal reefs, where juveniles form tight schools sheltering under ledges. Every Engineer Goby we ship is feeding well.
It's a real, dedicated tunnel-builder, and a group can move several pounds of sand per day, reshaping substrate and potentially destabilising loosely placed rockwork, so we secure all rockwork directly on the tank base before introducing this species, and recommend the same setup at home. It's reef safe with caution; it won't directly harm corals or invertebrates, but its relentless burrowing can shift sand onto low-placed corals and disturb the aquascape. This species is hardy and disease-resistant once established, and does best introduced as a small group or pair simultaneously, in a mature tank with a deep sand bed. It eventually grows quite large, so plan tank size around its adult size, not the small striped juvenile typically sold. It reaches up to 30-34cm, so plan on at least 280L.
 
💡 Highlights
🎨 Striped Juvenile to Barred Adult: A dramatic transformation over time
🐍 Catfish Mimicry: Juveniles mimic a venomous species for protection
🏗️ A Dedicated Tunnel Builder: Can move pounds of sand daily; secure rockwork is essential
🌿 Reef Safe With Caution: Burrowing may disturb low-placed corals
📏 Grows Large: Plan tank size around its adult size, not the small juvenile