Engineer Goby (3-Pack)
The Engineer Goby (Pholidichthys leucotaenia), also widely known as the Convict Goby or Convict Blenny, is one of the most intriguing and unique marine fish available to hobbyists. Despite its common names, this species is neither a true goby nor a blenny; it belongs to its own distinct family, Pholidichthyidae. Juveniles feature striking black-and-white horizontal stripes reminiscent of a convict’s uniform or a coral cat shark, while adults undergo a dramatic visual transformation into a pattern of dark, vertical bars and marbling on an elongated, eel-like body.
Native to the Central Indo-Pacific, from the Philippines to the Solomon Islands, the Engineer Goby is famous for its tireless burrowing behavior and active lifestyle in sandy or rubble-rich environments.
| Specification | Detail |
|---|---|
| Species | Pholidichthys leucotaenia |
| Quantity | 3 pieces |
| Size (adult) | Up to 6 inches |
| Temperament | Peaceful, territorial with conspecifics |
| Water Conditions | Salinity: 1.020–1.025, Temperature: 72–78°F |
FAQ
What is the difference between Engineer Goby and Convict Blenny?
The Engineer Goby (Pholidichthys leucotaenia) is not a true goby or blenny. It belongs to the family Pholidichthyidae. Juveniles have black-and-white horizontal stripes, while adults develop dark vertical bars and marbled patterns. The term ‘Convict Blenny’ is a common misnomer, as it is not a blenny at all.
How big do Engineer Gobies grow?
Adult Engineer Gobies can grow up to 6 inches in length, with a slender, eel-like body that becomes more elongated as they mature.
What kind of environment do they prefer?
Engineer Gobies thrive in sandy or rubble-rich substrates and require a well-planted tank with hiding spots. They are active burrowers and benefit from a stable, moderately heated marine environment.
Heather Wilkins –
Received the 3-pack of Engineer Gobies and they’ve been active and healthy in my 30-gallon tank. The juveniles have the striking black-and-white stripes, and I’ve noticed they’re digging in the sand regularly. They seem to enjoy the environment and don’t stress with other fish. Great addition to a marine setup.
Ruth Wright –
The fish arrived quickly and looked healthy. They’ve adapted well to the tank conditions. I was a bit unsure about the name confusion between goby and blenny, but the description clarified that. They’re active and curious, especially when exploring the sand bed.
Tim Harris –
I’ve had a few marine fish before, but the Engineer Goby is a unique choice. The color change from juvenile to adult is fascinating to watch. They’re peaceful and don’t bother other species. The 3-pack is a good value for the variety and size.