Decorator Crabs: Walking Gardens of the Kelp Reef
Decorator crabs build living costumes from algae, sponges and anemones using velcro-like hairs. How the disguise works, why it evolved and where to see it.
Dr. Mara Ellison ·
21 articles
Decorator crabs build living costumes from algae, sponges and anemones using velcro-like hairs. How the disguise works, why it evolved and where to see it.
Dr. Mara Ellison ·
The giant kelpfish changes colour to vanish among kelp blades. Identification, camouflage, behaviour and life cycle of this Southern California clinid.
Dr. Theo Nakamura ·
Meet the grass rockfish (Sebastes rastrelliger): a shallow-water ambush predator that barely leaves home — and pays for that loyalty when the pressure comes.
Dr. Mara Ellison ·
The grunt sculpin is a thumb-sized fish that walks on its fin rays, hides inside empty barnacle shells and, it seems, impersonates the barnacle itself.
Dr. Mara Ellison ·
Red Irish lords are mottled, spiny, glued-to-the-rock sculpins that vanish against red algae and barnacles — a masterclass in benthic camouflage.
Dr. Theo Nakamura ·
The red sponge dorid (Rostanga pulchra) lives, feeds and hides on one red sponge — a thumbprint-size lesson in camouflage every tidepooler can find.
Dr. Theo Nakamura ·
Meet the saddleback gunnel — the saddle-marked, eel-shaped shore fish of Pacific kelp edges, and how to tell it from true eels and its gunnel relatives.
Dr. Mara Ellison ·

The Pacific spiny lumpsucker is a walnut-sized armoured fish that clamps to kelp and eelgrass with a suction-disc belly. Biology, range, where to look.
Dr. Theo Nakamura ·
Identify the coralline sculpin — the small California reef fish whose pink-and-grey skin lets it vanish against crusts of coralline algae.
Dr. Theo Nakamura ·
East Pacific red octopus Octopus rubescens: den middens, colour-flash camouflage, egg brooding and night hunting in California's kelp forests.
Dr. Theo Nakamura ·
The rockweed gunnel is a slender Pacific shore fish so perfectly matched to seaweed butter and olive tones that it looks like the rockweed itself.
Dr. Theo Nakamura ·
Red in red algae, green in surfgrass, spotted all over — the spotted kelpfish rewrites its own wardrobe to match the kelp it hides in. How to know one.
Dr. Theo Nakamura ·
The umbrella crab hides its legs beneath a flared, kelp-coloured carapace, drifting undetected across the holdfasts and rocky floors of Pacific kelp forests.
Dr. Mara Ellison ·
The leafy seadragon is the most perfectly disguised fish in the sea. Explore its South Australian strongholds, brooding males and fragile future.
Dr. Mara Ellison ·

Meet the bay pipefish, the Pacific coast's eelgrass mimic — a seahorse relative that hunts like a drifting grass blade from Alaska to Baja.
Dr. Theo Nakamura ·

Meet the sharpnose crab — a small Pacific spider crab that plants living algae on hooked hairs across its shell. How the disguise works and where to find it.
Dr. Mara Ellison ·
The crevice kelpfish can turn from red to brown to match the algae it hides in. Meet the small, coiled shape-shifter living inside the kelp forest's foundations.
Dr. Elias Brandt ·
The mosshead warbonnet is a moss-fringed, eel-like prickleback of North Pacific reefs — a shy, hole-loving specialist of kelp-bed cracks and crevices.
Dr. Theo Nakamura ·
Meet the penpoint gunnel — an eel-shaped Pacific shore fish that changes colour with its seaweed and guards eggs in a ball under the rocks.
Dr. Mara Ellison ·
The scalyhead sculpin is a tassel-headed, fully scaled cottid of Pacific kelp beds — a small ambush hunter whose males turn crimson over guarded egg masses.
Dr. Theo Nakamura ·
The brown Irish lord is a spiny, red-bellied sculpin of North Pacific reefs — a camouflaged ambush hunter of crabs and shrimps from Alaska to California.
Dr. Theo Nakamura ·