Batoid (Batoidea) | Characteristics, Habitats & Amazing Facts

Name - Batoid

Scientific Name : Batoidea

Type : Aquatic Animal 

Age : 15 to 25 years

Diet : Carnivore

Physical Characteristics:

Length : 30 cm To 6.1 m.

Weight : upto 6,000 pounds

Top Speed : 30 mph 

Colour : camouflaged by a grayish-brown, often mottled coloration

Skin Type : do not have bone, but rather, cartilage

Lifespan : 15 to 25 years 

Current Population : XXXXXX

Current Population Trend : decreasing

Native : tropical and subtropical marine environments, although there are temperate and cold-water species

Facts

Main Prey : snails, clams, oysters, crustaceans, and some fish

Habitat : oceans as well as in freshwater

Predators : Sharks, seals, rays and sea lions 

Lifestyle : nocturnal and Diurnal 

Favourite Food :  oysters

Amazing Facts

·        Stingrays, electric rays, skates, guitarfish, and sawfish are all members of the Batoidea superorder, which comprises stingrays, electric rays, skates, guitarfish, and sawfish. Batoids have skeletons made of durable connective tissue called cartilage, similar to sharks, their close relatives.

·        Some rays use their blunt teeth, also known as bony plates, to crush their prey. (The word “bony plates” is a misnomer since rays are made up of cartilage rather than bone.) Rays are mostly totally buried in the sand or soft sediment, and their coloration is grayish-brown and mottled.

·        Some rays gently flap their expanded pectoral fins, or “wings,” to “jump” through and often even leap out of the water, similar to birds in flight. A southern stingray (Dasyatis americana) may have a wingspan of up to 1.5 metres.

·        Stingrays, with their long, slender, whiplike tails armed with serrated, venomous spines, are among the most well-known rays. When a stingray is trapped, stepped on, or otherwise disturbed, it lashes its tail as a protective measure.

·        While some rays are commercially important food sources in many parts of the world, they are not currently considered threatened or endangered. Concerns about the future of rays across their range are rising as a result of humanity’s effect on the marine environment.

·        Rays are present in over 600 different species around the world. Each of these fish belongs to one of the 24 Ray families based on their body shape and behaviour. Rays have large pectoral fins fused to their heads and are all smooth. The mouth and gill slits are on the ventral (lower) side, while the fins, eyes, and tail are all on the dorsal (upper) side.

·        The ray’s tail is usually long and slender, with one or more sharp, saw-edged, venomous spines that can be used to cause painful wounds in many animals.

·        Internal fertilisation occurs when a male introduces sperm into a female via special copulatory organs (claspers), which are modified edges of the pelvic fins.

·        Batoids have a variety of ways to replicate. Batoids have internal fertilisation, which is common in elasmobranchs. Batoids benefit from internal fertilisation because it conserves sperm, protects eggs from predators, and ensures that all of the energy spent in reproduction is preserved rather than lost to the environment.

·        Both skates and some rays are oviparous (egg-laying), while others are ovoviviparous (giving birth to young that develop in the womb but do not require the presence of a placenta).

·        Oviparous skates lay their eggs in leathery egg cases known as mermaid’s purses, which often wash up empty on beaches in areas where skates are common.

·        According to a report published in Nature in 2021, the global population of oceanic sharks and rays has decreased by 71% in the last 50 years, jeopardising “the health of whole ocean populations as well as food security for some of the world’s poorest countries.” Overfishing has raised the global extinction risk of these animals, placing three-quarters of them at risk of extinction.

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