This past Saturday, my daughter and grandson Gabriel found Humboldt squid stranded at the Moss Landing & Salinas River State Beach, and over the weekend, there were reports of hundreds of stranded and dead Humboldt squid in areas along the Central California coast.
Think squid for calamari steaks, and not the small “market” squid — the calamari rings that many of us eat for appetizers.
Market squid (Doryteuthis opalescens) only grow to about 11 (28cm) inches long.
On Sunday, we were at the Monterey Bay Aquarium, where we watched a Humboldt squid swimming in the aquarium’s tide pool.
According to a Monterey Bay Aquarium staff member, the Humboldt squid was trapped in their tide pool after high tide. Apparently, this has not happened in 28 years at the Aquarium. I checked the opening year of the Aquarium — 1984 — which means this has never happened before…
It was a rare opportunity to see a Humboldt squid swimming in an enclosed area…and all from the comfort and safety of the Monterey Bay Aquarium’s deck overlooking the tide pool.
We found out that squid swim backwards by pumping water through valves near their heads. It was odd to see the squid moving about with its tentacles and head behind, instead of in front of the movement.
What a lucky day to visit the Monterey Bay Aquarium!
Really….how often do you get to watch a Humboldt squid swimming without having to actually be in the water? It is probably one of those days my grandsons will remember.
Interesting information from Wikipedia on the Humboldt squid:
El Niño factors
Although Humboldt squid are generally found in the warm Pacific waters off of the Mexican coast, recent years have shown an increase in northern migration. The large 1997-98 El Niño event triggered the first sightings of Humboldt squid in Monterey Bay..
Then, during the minor El Niño event of 2002, they returned to Monterey Bay in higher numbers and have been seen there year-round since then. Similar trends have been shown off the coasts of Washington, Oregon, and even Alaska, although there are no year-round Humboldt squid populations in these locations.
This change in migration is suggested to be due to warming waters during El Niño events, but other factors, such as a decrease in upper trophic level predators that would compete with the squid for food, could be impacting the migration shift, as well.
A study published in the Proceedings of the National Academy of Sciences found that by the end of this century, ocean acidification will lower the Humboldt squid’s metabolic rate by 31% and activity levels by 45%. This will lead the squid to have to retreat to shallower waters, where they can take up oxygen at higher levels.
Here is a video from local news reports…did these baby Humboldt squid eat toxic algae?
From UCSC Science Notes 2012: The Sea Longs for Red Devils
Article by Daniela Hernandez dives into a giant marine mystery — and why the elusive Humboldt squid has abandoned a Mexican fishery in need. With illustrations by Rena Ekmanis.
California Market Squid – from NOAA, FISH WATCH U.S. Seafood Facts
…California’s market squid fishery is unique for several reasons. Fishermen usually fish for market squid at night directly (more here)