Behavior and Reproduction
Sea urchins are often found living in clumps from five to ten. They have the ability to regenerate lost spines. Lifespan often exceeds 30 years, and scientists have found some specimens to be over 200 years old.
Spawning peaks between June and September. Eggs are fertilized externally while they float in the ocean, and planktonic larvae (echinopluteus) remain in the water column for about a month before settling on the bottom of the sea floor, where they undergo metamorphosis into juvenile urchins. These juveniles use chemical cues to locate adults. Although juveniles are found almost exclusively under aggregated adults, the adults and juveniles are not directly related. Red Sea Urchins can effectively reproduce at an advanced age.
Read more about this topic: Red Sea Urchin
Famous quotes containing the words behavior and/or reproduction:
“I like to think of my behavior in the sixties as a “learning experience.” Then again, I like to think of anything stupid I’ve done as a “learning experience.” It makes me feel less stupid.”
—P.J. (Patrick Jake)
“The atmosphere parents wish to create when talking with children about birth and reproduction is warm, honest, and reassuring, one that tells children they are free to ask questions as often as they need to, and you will answer them as lovingly as you know how.”
—Joanna Cole (20th century)