California sea cucumber
A solitary nocturnal scavenger found from Alaska to Baja California.
The California sea cucumber (Apostichopus californicus), sometimes called the giant California sea cucumber, ranges from the Gulf of Alaska down to Baja California. It lives from the low intertidal zone down to 250 meters (820 feet) deep, and is most common where currents are moderate and the seafloor is made of cobbles, boulders, or bedrock. People harvest it through small-scale artisanal fishing.
This sea cucumber can reach 50 centimeters (1 foot 8 inches) long and 5 centimeters (2 inches) wide. Its body is soft and cylindrical, covered in leathery skin that ranges from reddish-brown to yellowish. Just beneath the skin lies an endoskeleton. The mouth and anus sit at opposite ends of the body. Around the mouth are twenty retractable tentacles used to gather food. Five rows of tube feet run from the mouth to the anus, and those on the underside help it cling to rocks.
It is a scavenger, feeding on organic matter by sifting through sediment with its tentacles or by positioning itself in a current to catch drifting food. It can live up to ten years.
*A. californicus* is solitary and active at night. When threatened, it may eviscerate—expelling its internal organs through the anus—or release sticky filaments to entangle or confuse predators. The sexes are separate, and fertilization occurs externally. Spawning typically happens in August, with each female releasing thousands of eggs. After fertilization, a larva develops and metamorphoses into a sea cucumber within a few weeks.
Quick Facts
- Genus
- Apostichopus
- Species
- californicus
Facts from the source article.
Lore & Background
The California sea cucumber has a soft, cylindrical body with red-brown to yellowish leathery skin and an endoskeleton just below the skin. Its mouth and anus are on opposite ends, with the mouth surrounded by twenty retractable tentacles used to bring in food. Five rows of tube feet extend from the mouth to the anus, and those on the underside are used to attach to rocks.
It is a scavenger that feeds on organic matter, sifting through sediments with its tentacles or positioning itself in a current to catch flowing food. When threatened, it can eviscerate by expelling its organs through its anus, or expel sticky filaments to ensnare or confuse predators.
Reproduction involves separate sexes with external fertilization. Spawning usually occurs in August, and each female can produce thousands of eggs. After fertilization, a larva forms and metamorphoses into a sea cucumber after a few weeks.
Reader's Guide
The California sea cucumber is notable as an artisanal fishery species, though the article provides no further details on its economic or cultural significance. Its ability to eviscerate and expel sticky filaments as defense mechanisms are distinctive behaviors. The species is solitary and nocturnal, and its feeding strategy as a scavenger using tentacles to sift sediment or catch drifting organic matter highlights its ecological role in benthic environments. The article notes a maximum lifespan of 10 years and a spawning period in August, with external fertilization producing thousands of eggs per female. Its range from the Gulf of Alaska to Baja California and depth range to 250 m indicate a broad distribution. The presence of an endoskeleton and leathery skin are physical characteristics. No further significance or legacy is described in the source.
Did You Know?
- The California sea cucumber can grow to a length of 50 cm and a width of 5 cm.
- It has twenty retractable tentacles surrounding its mouth.
- When threatened, it can expel its organs through its anus or release sticky filaments.
- Spawning usually takes place in August, with each female producing thousands of eggs.
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