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Tank RadioReef Salt Sanctuary

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Aquarist’s noteWe added a mandarin goby and named him Mando. Can you find him?

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Who's in the tank?

20 residents 13 fish, 4 snails, and 3 shrimp are calling the tank home right now.

New resident

Mando the Mandarin Goby

Synchiropus splendidus

In the tank: 1

Mando is a small reef fish covered in electric blue, orange, and green patterns. Mandarin gobies spend much of their time gliding over rockwork as they search for tiny foods, making him a colorful resident to watch for near the bottom of the tank.

Home waters: Sheltered lagoons and coastal reefs across the western Pacific, especially among coral rubble and branching coral.
What they like: Mature live rock, peaceful tankmates, stable saltwater, and a steady supply of tiny crustaceans called copepods.
Fun fact: Despite the common name, mandarin gobies are actually dragonets and are famous for their swirling, psychedelic colors.

Blue Tang

Paracanthurus hepatus

In the tank: 1

Also known as Dory, this bright reef fish has an electric blue body, bold black markings, and a sunny yellow tail. Blue tangs are active swimmers, so Dory may cruise across the camera and then vanish back into the rockwork.

Home waters: Indo-Pacific coral reefs, usually around clear lagoons and reef slopes with plenty of room to swim.
What they like: Open swimming space, stable saltwater, algae-based foods, and sheltered places to tuck in when they want a break.
Fun fact: Blue tangs can wedge themselves into reef crevices at night, using their flattened bodies and tail spines for extra protection.

Foxface

Siganus vulpinus

In the tank: 1

A bold yellow rabbitfish with a black-and-white face mask and a long pointed snout. Foxfaces are reef grazers that help pick at algae while bringing a bright flash of color to the tank.

Home waters: Indo-Pacific coral reefs, lagoons, and reef flats.
What they like: Open swimming room, rockwork to browse, stable saltwater, and plenty of algae-based foods.
Fun fact: Foxface rabbitfish have venomous dorsal spines, so tankmates usually learn to give them respectful space.

Yellow Watchman Goby

Cryptocentrus cinctus

In the tank: 1

A larger bottom-dwelling goby with bright yellow coloring and alert eyes. Yellow Watchman Gobies often stay near the sand and rockwork, keeping watch from a favorite burrow entrance.

Home waters: Shallow Indo-Pacific reefs, sandy lagoons, and rubble zones.
What they like: Sandy bottom areas, secure burrows, stable saltwater, and peaceful tankmates.
Fun fact: Yellow Watchman Gobies are famous for symbiotic partnerships with pistol shrimp: the shrimp digs while the goby keeps lookout.

Royal Gramma fish

Gramma loreto

In the tank: 1

A bright Caribbean reef fish with a vivid purple front half and sunny yellow tail. Royal Grammas usually tuck into rockwork and hover near caves once they settle in.

Home waters: Tropical reef ledges and caves across the Caribbean and western Atlantic.
What they like: Peaceful tankmates, stable saltwater, rocky hiding spots, and small meaty foods.
Fun fact: Their purple-to-yellow color split makes them one of the easiest reef fish to spot on camera.

Clownfish

Amphiprion ocellaris

In the tank: 2

Orange-and-white reef fish with bold black-edged stripes. Clownfish are famous for living safely among sea anemones, protected by a special mucus coating on their skin.

Home waters: Warm saltwater reefs and lagoons in the Indo-Pacific.
What they like: Sheltered reef spaces, steady warm water, and small meaty foods.
Fun fact: Clownfish can recognize and defend their favorite home area.

Blenny

Blenniidae

In the tank: 1

A small personality fish that often perches in visible spots around the tank. This blenny came from Seaside Tropical Fish in Huntington Beach and should be great for close-up camera moments.

Home waters: Many blennies live around shallow saltwater reefs, rocky ledges, tide pools, and algae-covered surfaces.
What they like: Rockwork perches, little caves, stable saltwater, and spots where they can watch the tank from the bottom or ledges.
Fun fact: Blennies are known for expressive faces and quick little perch-and-hop movements that make them fun on camera.

Blue-green chromis

Chromis viridis

In the tank: 3

Shimmering blue-green damselfish that often hover together above branching coral. There are three of these active little reef fish in the tank right now.

Home waters: Indo-Pacific coral reefs and lagoons, including the Red Sea and Great Barrier Reef.
What they like: Open swimming room, coral cover, and the safety of a small school.
Fun fact: Their iridescent color can shift from apple-green to light blue depending on the light.

Pajama cardinalfish

Sphaeramia nematoptera

In the tank: 2

A peaceful reef fish with a bright red eye, yellow-green face, dark middle band, and pajama-like red spots across the back half of its body. Pajama cardinalfish tend to hover calmly near shelter instead of racing around the tank.

Home waters: Western Pacific reefs, lagoons, and sheltered coral areas from Indonesia toward northern Australia.
What they like: Calm water, peaceful tankmates, protected hiding places, and small meaty foods.
Fun fact: Their polka-dot pattern is what gives them the “pajama” nickname.

Photo: Francois Libert / CC BY-SA 2.0, background removed.

Saltwater snail

Marine gastropod

In the tank: 4

A small cleanup-crew grazer that moves slowly over rocks, glass, and sand while helping tidy up algae and leftover bits.

Home waters: Saltwater reefs, tide pools, rocky shorelines, and sandy reef flats.
What they like: Algae films, stable salinity, and plenty of hard surfaces to explore.
Fun fact: Many aquarium snails do important invisible work by grazing surfaces that would otherwise grow algae.

Cleaner shrimp

Lysmata sp.

In the tank: 1

A classic reef cleanup-crew shrimp with long white antennae and a bright white stripe down its back. Cleaner shrimp are known for picking leftover food and parasites from reef fish.

Home waters: Tropical Indo-Pacific reefs, often around coral heads, rockwork, and cleaning stations.
What they like: Stable saltwater, peaceful tankmates, rockwork perches, and small meaty foods.
Fun fact: Fish may visit cleaner shrimp like a tiny underwater car wash, pausing while the shrimp tidies them up.

Blood red fire shrimp

Lysmata debelius

In the tank: 1

A brilliant red reef shrimp that likes to hang around caves and rockwork. This is the shy resident everyone is trying to spot on camera.

Home waters: Tropical Indo-Pacific reef slopes, caves, and ledges.
What they like: Quiet hiding spots, stable saltwater, peaceful tankmates, and small meaty foods.
Fun fact: Blood red fire shrimp can be bold at feeding time, then vanish back into the rockwork like nothing happened.

Tiger pistol shrimp

Alpheus bellulus

In the tank: 1

A tiny burrowing shrimp that has made a few surprise appearances after the rockwork was moved, then disappeared back into hiding. We believe there is one in the tank, but spotting him is part of the game.

Home waters: Shallow Indo-Pacific reef flats, sandy lagoons, and rubble zones.
What they like: Sand, small caves, stable saltwater, and plenty of rockwork for tunnels and cover.
Fun fact: Pistol shrimp can snap one oversized claw so fast it makes a tiny underwater pop.

Aquarium dashboard

Welcome, Mando

Mando the Mandarin Goby

Blue Tang

Foxface

Yellow Watchman Goby

Royal Gramma fish

Clownfish

Blenny

Blue-green chromis

Pajama cardinalfish

Saltwater snail

Cleaner shrimp

Blood red fire shrimp

Tiger pistol shrimp