“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Galveston in Galveston County, Texas — The American South (West South Central)

Beach Invertebrates

Discover Nature at the Beach

Beach Invertebrates Marker image. Click for full size.
Photographed By Duane Hall, October 9, 2015
1. Beach Invertebrates Marker
Inscription.  Animals without backbones are called invertebrates. Standing on the beach, wading in the surf, or swimming in the waters, you can encounter many varieties of Gulf invertebrates such as sand dollars, jellyfish, snails, crabs, and shrimp.

Sand Dollars
Sand dollars use numerous short spines on their round, flattened bodies to move beneath the nearshore sand where they escape waves and gather food. When sand dollars die, their spines wear away as the body washes ashore, leaving the bare, often broken skeletons found on the beach.

Traveling Clams
Coquina clams are members of a class of invertebrates known as bivalves, having two-part shells. They appear on the sand near the water’s edge during periods of tidal change. Waves wash them up the beach on a flooding tide and seaward on an ebbing tide. This movement keeps them in a favorable position to obtain food.

Predatory Snails
A hole in bivalve shells on the beach is the work of moon snails that live nearshore. Moon snails search for bivalves beneath the sand. When one is located, it is held with the foot while a toothed belt (radula)
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slowly creates a small circular hole in the shell. The meal is extracted through the hole.

Stinging Jellyfish
Cannonball (sometimes called “cabbagehead”) jellyfish are harmless, but the Portuguese man-of-war is not. The latter, actually a colony of very different individuals, is blown shoreward in large numbers and is recognized by its blue snail-like float. Avoid the tentacles that trail many feet beneath the float, because they can deliver a painful sting. Even ashore, tentacles remain alive for several days.

Crabs and Shrimp
Speckled crabs and blue crabs occur in the surf, so you might see or step on one. If you do, don’t panic; stand back and they will move away. Commercially important shrimp are found offshore. Shrimp move from bays into the Gulf of Mexico to mature into adults. Shrimp boats, sometimes visible on the horizon, catch the adults and sell them to local seafood markets.
Erected by Galveston Island Nature Tourism Council.
Topics. This historical marker is listed in this topic list: Environment.
Location. 29° 16.348′ N, 94° 48.928′ W. Marker is in Galveston, Texas, in Galveston County. Marker can be reached from Seawall Boulevard, 0.2 miles east of 53rd Street, on the right when
Beach Invertebrates Marker image. Click for full size.
Photographed By Duane Hall, October 9, 2015
2. Beach Invertebrates Marker
traveling east. Touch for map. Marker is in this post office area: Galveston TX 77551, United States of America. Touch for directions.
Other nearby markers. At least 8 other markers are within walking distance of this marker. The Original Galveston Seawall (within shouting distance of this marker); American Red Cross, Galveston County Chapter (within shouting distance of this marker); Galveston Seawall and Grade Raising (within shouting distance of this marker); The Birds of Galveston (about 300 feet away, measured in a direct line); Campeche / Galveston Island (about 400 feet away); Peter Leroy Colombo (approx. half a mile away); Burial Site of David G. Burnet (1788-1870) (approx. 0.6 miles away); "Ducky's Beach" (approx. 0.6 miles away). Touch for a list and map of all markers in Galveston.
More about this marker. As noted on the marker, “This interpretive sign was made possible by a generous donation from the Galveston Island Nature Tourism Council and the Rotary Club of Galveston.”.
Marker on the Galveston Seawall Promenade image. Click for full size.
Photographed By Duane Hall, October 9, 2015
3. Marker on the Galveston Seawall Promenade
Credits. This page was last revised on June 16, 2016. It was originally submitted on November 16, 2015, by Duane Hall of Abilene, Texas. This page has been viewed 607 times since then and 71 times this year. Photos:   1, 2, 3. submitted on November 16, 2015, by Duane Hall of Abilene, Texas.

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Jul. 16, 2024