“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.
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 waterís 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) slowly creates a small circular hole in the shell. The meal is extracted through the hole.

Stinging Jellyfish
Cannonball (sometimes called “cabbagehead”) jellyfish
Beach Invertebrates Marker image. Click for full size.
By Duane Hall, October 9, 2015
2. Beach Invertebrates Marker
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, donít 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.
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 traveling east. Click for map. Marker is in this post office area: Galveston TX 77551, United States of America.
Other nearby markers. At least 8 other markers are within 2 miles of this marker, measured as the crow flies. Galveston Seawall and Grade Raising (within shouting distance of this marker); The Birds of Galveston
Marker on the Galveston Seawall Promenade image. Click for full size.
By Duane Hall, October 9, 2015
3. Marker on the Galveston Seawall Promenade
(about 300 feet away, measured in a direct line); Campeche / Galveston Island (about 400 feet away); Peter Leroy Colombo (approx. half a mile away); "Ducky's Beach" (approx. 0.6 miles away); The Italian Vault (approx. 0.9 miles away); Rosewood Cemetery (approx. 0.9 miles away); Baden-Sproule House (approx. 1.2 miles away). Click for a list 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.”.
Categories. Environment
Credits. This page originally submitted on , by Duane Hall of Abilene, Texas. This page has been viewed 115 times since then and 47 times this year. Photos:   1, 2, 3. submitted on , by Duane Hall of Abilene, Texas. This page was last revised on June 16, 2016.
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