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Description
Barnacle Blenny Acanthemblemaria MacrospilusOverview The Barnacle Blenny is a charismatic and quirky marine fish known for its comical expressions, darting movements, and fascinating behavior. These small, tube dwelling blennies are often seen poking their heads out of barnacles, rock crevices, or coral holes, making them highly entertaining to observe. Despite their small size, they exhibit big personalities, often showing curiosity and territorial displays toward nearby fish or even their
OverviewThe Barnacle Blenny is a charismatic and quirky marine fish known for its comical expressions, darting movements, and fascinating behavior. These small, tube-dwelling blennies are often seen poking their heads out of barnacles, rock crevices, or coral holes, making them highly entertaining to observe. Despite their small size, they exhibit big personalities, often showing curiosity and territorial displays toward nearby fish or even their keepers.
Origin
Native to the Eastern Pacific Ocean, Barnacle Blennies are most commonly found along the coastlines of Mexico, particularly in the Gulf of California. They inhabit shallow reef environments and rocky intertidal zones, often sheltering in empty barnacle shells or other small crevices in coral rubble and rocky substrates.
Feeding
In the wild, Barnacle Blennies feed primarily on zooplankton and other tiny organisms drifting in the water column. In captivity, they accept a range of finely sized meaty foods:
Live or frozen mysis shrimp
Baby brine shrimp
Copepods
High-quality marine micro pellets
Finely chopped seafood or enriched frozen blends
Feed small amounts 1–2 times daily, making sure food drifts near their hiding spots for easy capture.
Tank Mates
Barnacle Blennies do best in peaceful, reef-safe community tanks with other non-aggressive species. Ideal tank mates include:
Gobies
Clownfish
Cardinalfish
Dwarf wrasses (peaceful species)
Small reef-safe invertebrates (such as cleaner shrimp)
Avoid housing them with large or highly territorial species, especially those that may compete for similar shelter or harass the blenny in its burrow.
Aggression
While generally peaceful, Barnacle Blennies can be territorial—particularly toward other blennies or fish that invade their space. They may display fin-flaring or quick lunges from their burrow to intimidate rivals. It's best to keep only one Barnacle Blenny per tank unless housed in a very large system with ample hiding spots.
Experience Level
Beginner to intermediate. Barnacle Blennies are hardy and relatively undemanding as long as they have appropriate hiding spots and stable, clean water. Their unique behavior makes them a favorite for nano reef tank enthusiasts and seasoned aquarists alike.
Water Parameters
Temperature: 22–27°C (72–80°F)
pH: 8.1–8.4
Salinity: 1.023–1.025
dKH: 8–12
Tank Size: Minimum 10 gallons (nano reef suitable, with strong emphasis on available hiding spots)
Special Notes
Provide multiple small crevices, shells, or barnacle clusters as shelter.
They spend most of their time in their burrow, darting out to feed or chase away intruders.
They are reef-safe and won’t harm corals or invertebrates.
Their expressive faces and peeking behavior make them highly entertaining additions to a reef aquarium.
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★★★★★ 5
Works great
Style: Trim & Plastic Restorer, 12 fl. oz.
This shined up my car really well, looks like new!
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Worked wonderfully and so easy!
Couldn’t believe how great this worked! I was waxing my car when I decided to wax the bumpers thinking this would protect them from the dry, sunny climate I live in. The bumpers turned white!!! Got the Meguiar’s Ultimate Black Plastic Restorer, wiped it on and they look brand new!!! Lesson to self…don’t wax plastic! I highly recommend.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
It works effectively but be patient
This is great stuff but do not expect it to turn really faded out black plastic on the outside of your car to like-new condition after one application. However if you apply this to the black plastic on your car after each wash, it will soak in and turn it into an almost new appearance. And it will last! It works great but be patient.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
I recommend!
Shines the black trim very well! Doesn't look dull anymore!
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Quality products
Been using Meguiers since the 70's. Never disappointed.
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Reviewed in the United States on May 30, 2026