''Urosalpinx cinerea'',

common name In biology, a common name of a taxon or organism (also known as a vernacular name, English name, colloquial name, country name, popular name, or farmer's name) is a name that is based on the normal language of everyday life; and is often contra ...

the eastern oyster drill or Atlantic oyster drill, is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

of small predatory sea snail, a

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is es ...

in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Muricidae Muricidae is a large and varied taxonomic family of small to large predatory sea snails, marine gastropod mollusks, commonly known as murex snails or rock snails. With about 1,600 living species, the Muricidae represent almost 10% of the Ne ...

, the murexes or rock snails. They use

chemoreception A chemoreceptor, also known as chemosensor, is a specialized sensory receptor which transduces a chemical substance (endogenous or induced) to generate a biological signal. This signal may be in the form of an action potential, if the chemorecept ...

in their environment and are found to be sessile and encrusting organisms. Microscopic particles released by prey are carried through the sea water and captured by the Atlantic oyster drill. This animal is not physically able to close itself from its surrounding environment because of its

siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water ...

. This species is a serious problem in commercial oyster beds, and it has been accidentally introduced well outside its natural range.

Distribution

This snail is endemic to the

Atlantic The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the "Old World" of Africa, Europe an ...

coast of North America, from

Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native En ...

to Nassau Sound in in

Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, a ...

. It has been accidentally introduced with oyster spat to Northern Europe and to the West Coast of North America from

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...

Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered o ...

. They range in areas with salinity and temperature changing seasonally and with the tidal currents.

Habitat

This species lives from

low tide Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables ...

down to a depth of 25 feet. Its surroundings are rocky and shell beds. It inhabits the lower third of the littoral zone, therefore it is sheltered from any waves the ocean produces.

Life habits

As indicated by its common name, this predatory snail drills through the shells of living oysters and consumes them. Its surroundings are rocky and shell beds. It inhabits the lower third of the

littoral zone The littoral zone or nearshore is the part of a sea, lake, or river that is close to the shore. In coastal ecology, the littoral zone includes the intertidal zone extending from the high water mark (which is rarely inundated), to coastal ...

, therefore it is sheltered from any waves the ocean produces. It selects its food of choice by the odor of the prey. Once it embraces the barnacle or mussel with its foot, it drills through the shell. It feeds on many different species of invertebrates. A few favorites are the barnacle ''Balanus balanoides'' and the mussel ''

Mytilus edulis The blue mussel (''Mytilus edulis''), also known as the common mussel, is a medium-sized edible marine bivalve mollusc in the family Mytilidae, the mussels. Blue mussels are subject to commercial use and intensive aquaculture. A species with a ...

''. Food supply is mainly found in

intertidal areas The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species o ...

in the Atlantic region. The Atlantic oyster drill finds its food by smell. They are found to be more responsive to living prey than to prey that has been killed recently in a lab. However there is still no preference when it comes to the prey species or age. Just like any other animal, ecological factors affect the growth of an individual. The type of food, amount of food, and the amount of time given for a species to grow are all important factors. Chloride and sodium, inorganic ions, are some of the major effectors of blood in marine and estuarine invertebrates, including the Atlantic oyster drill. They range in size, but male and female oyster drills average 24 millimeters and 28 millimeters, respectively. Not only are females longer, but they are also taller than their males''.'' Almost all Atlantic oyster drills reach their largest size after two full growing seasons. About 70% of their size is reached within this time span. In the next four or so years to come, there is little or no increase in size anymore. Unfortunately, there is no protected way to check the sex of these gastropods. Their shell must be crushed in order to see the genitalia using a microscope. Although some females possess a small vestigial formation that may look like a penis, other parts are used to confirm the sex. Finding the egg capsule gland, ovary, and any sperm ingesting glands make it easier to identify the oyster drill as a female.

Human relevance

Due to their ability of "drilling" into shells, the destruction of their nature can cost millions of dollars every single year. This snail is a serious problem in commercial oyster farming:

"Next to the
sea star Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish ...
, this snail is the worst enemy the ... yster fisher men... have to contend with. ...Settling upon a young
bivalve Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, biv ...
, the oyster drill quickly bores a neat round hole through a valve, making expert use of its sandpaperlike
radula The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food ...
. Through this perforation the oyster drill is able to insert its long
proboscis A proboscis () is an elongated appendage from the head of an animal, either a vertebrate or an invertebrate. In invertebrates, the term usually refers to tubular mouthparts used for feeding and sucking. In vertebrates, a proboscis is an elonga ...
and consume the soft parts of the
oyster Oyster is the common name for a number of different families of salt-water bivalve molluscs that live in marine or brackish habitats. In some species, the valves are highly calcified, and many are somewhat irregular in shape. Many, but not a ...
."

Advocates of making use of

bycatch Bycatch (or by-catch), in the fishing industry, is a fish or other marine species that is caught unintentionally while fishing for specific species or sizes of wildlife. Bycatch is either the wrong species, the wrong sex, or is undersized or juven ...

, rather than discarding it, have promoted the oyster drill as a food, similar to

escargot Snails are considered edible in many areas such as the Mediterranean region, Africa, or Southeast Asia, while in other cultures, snails are seen as a taboo food. In American English, edible land snails are also called escargot, taken from the Fren ...

.Engelhardt, Elizabeth
"An Oyster by Any Other Name"
''Southern Spaces'', 18 April 2011

References

External links

MBL Marine Organisms Database page
{{Taxonbar, from=Q2501170 Muricidae Molluscs of the Atlantic Ocean Gastropods described in 1822 Taxa named by Thomas Say