Skip to content. | Skip to navigation

Personal tools
Log in
You are here: Home Blog First Day of Steinhart Expedition chances upon a coral spawning event - Updated [Videos]

First Day of Steinhart Expedition chances upon a coral spawning event - Updated [Videos]

By Matt Wandell - Posted May 13, 2011 02:00 PM
Steinhart Aquarium staff are currently in the Philippines surveying the reefs that serve as inspiration for the 212,000 gallon Philippine Coral Reef exhibit at the California Academy of Sciences in San Francisco. The most surprising part of the expedition so far--a coral spawning event on the first night dive.
First Day of Steinhart Expedition chances upon a coral spawning event - Updated [Videos]

Acropora sp. spawning.

Many corals reproduce by releasing millions of eggs and sperm into the water in coordinated events. What better way to ensure you'll find a mate than triggering a mass orgy? The coral gametes are positively buoyant and collect at the water surface, where fertilization takes place. Within a few days the fertilized eggs develop into what are called planula larvae, a small sausage shaped stage of the coral which has the sole task of finding and settling on a suitable location where the coral colony will spend the rest of its life.

For public aquariums interested in displaying corals in captivity, spawning events are a big deal. The collection of millions of potential coral fragments can be accomplished in a sustainable way with no damage to the existing coral colonies. An initiative of public aquariums and coral reef scientists called SECORE (SExual COral REproduction) collects gametes from spawning events and carefully holds them until they are fertilized and ready to settle in captivity. SECORE's tireless work in the Caribbean has resulted in thousands of captively grown fragments of the critically endangered stony coral Acropora palmata.

On the second day of the Philippine expedition Steinhart staff collected several hundred egg and sperm bundles from two yet-to-be-identified spawning Acropora spp. Tending to the fertilized eggs is a delicate task, but we hope to have fantastic news of settlement in the next few days.


During the Hearst Expedition, biologist from the California Academy of Sciences witnessed Acropora sp spawning (video below). They collected the spawn and are attempting to get it to settle while in the field.

Author: Matt Wandell
Location: San Francisco

Matt is an Aquatic Biologist at the Steinhart Aquarium, California Academy of Sciences in San Francisco where he helps tend to the 200,000 gallon Philippine Coral Reef exhibit, and has been an avid reefkeeping hobbyist since 1999.


Document Actions
blog comments powered by Disqus


Contribute to our blogs!

Do you have news or discussion topics you want to see blogged?  Let us know!