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markscherz:

marinemammalblog:

Hydroplaning
This hunting technique is strictly done by females and their offspring in the shark bay area. While hydroplaning dolphins use the shoreline and the air as a barrier herding the fish into the shoreline until the fish has nowhere to go but into the dolphin’s mouth. X


Nyoooooom
ichthyologist:

 Spotted Eagle Ray (Aetobatus narinari)
Eagle rays are found globally in tropical regions, preferring to swim in waters between 24 to 27 °C (75 to 81 °F). They are very graceful swimmers and appear to glide through the water effortlessly.
Peter Liu on Flickr

Fish Fact #5

izzy-the-fish-girl:

swimminginaquariums:

Guppies have been deliberately set free in Asian waters to fight the spread of malaria. Malaria is passed on to humans by mosquitoes, but guppies eat mosquito larvae, which helps reduce the number of mosquitoes and slows the spread of the disease.

image

Actually, from what I’ve read they had no discernible impact on the mosquito populations. In fact the only impact they had was a negative one on the local fish populations. (source)

danidoroi:

Australian Endangered Species: Largetooth Sawfish

By Peter Kyne, Charles Darwin University
Sharks and rays are some of the world’s most threatened animals, with a quarter of all species at risk of extinction. Among the sharks and rays, sawfish are some of the most threatened, with all five species listed as Critically Endangered or Endangered by the International Union for Conservation of Nature (IUCN).
The Largetooth Sawfish (Pristis pristis), previously known locally as the Freshwater Sawfish, is one of the planet’s largest fish, growing to over 6.5m in length.
The Largetooth Sawfish is a “euryhaline” species: capable of moving freely across a range of salinities from pure freshwater to the oceans. Its life cycle is complex and fascinating, encompassing a wide variety of habitats – floodplains, billabongs, creeks, rivers, estuaries and marine waters.
Young Largetooth Sawfish are born in estuaries before migrating upstream to spend their first 4-5 years of life in river systems. Locally they have been recorded up to 400 kilometres from the coast in the Fitzroy River. Upon nearing maturity they move back to coastal and marine waters.
Read the full article here
griseus:

Tattoo skin disease (TSD) in cetaceans is characterised by irregular, grey, black or yellowish, stippled skin lesions that may occur on any part of the body but show a preferential distribution depending on the species. With some experience, tattoo lesions (or ‘tattoos’) are readily distinguished macroscopically from other types of integument blemishes and scars. Individual tattoos may persist for months, or even years, and recur, they eventually heal and convert into light grey marks.
TSD is caused by poxviruses that belong to a new genus of the subfamily Chordopoxvirinae (family Chordopoxviridae), but have a common, most immediate ancestor with terrestrial poxviruses of the genus Orthopoxvirus. Poxviruses affecting Delphinidae and Phocoenidae belong to different species.
Photo: Costero Sotalia guianensis. Regressing tattoos (arrowheads) on the dorsum of a dolphin from Sepetiba Bay, Brazil. (b) Chilean dolphin Cephalorhynchus eutropia. Regressing tattoos (arrowheads) on dorsum and dorsal fin of an adult dolphin from Reñihue Fjord, northern Patagonia, Chile.
Reference (Open Access) Van Bressem et al. 2009 Epidemiological pattern of tattoo skin disease: a potential general health indicator for cetaceans. Dis Aquat Org
darwinoid:

animalwelfarists:

(via Animal Farm Foundation)

BSL is a fear-based solution. Studies have shown that in order to prevent a single hospitalization resulting from a dog bite, a city would have to ban more than 100,000 dogs of a targeted breed. (x) And to prevent a second hospitalization, double that number. Not only is BSL expensive to implement but it results in the mistreatment and destruction of many family pets. Dog owners put their dogs into hiding. Outdoor exercise is restricted, socialization is compromised, and microchipping and proper veterinary care are usually out of the question. You can only imagine what drastic impacts these effects have not only on the dogs themselves but public safety as well. 
miniminke:

Did you know whales and dolphins are in the same order?
The order is called Cetacea.
     Suborder Mysticeti have baleen (whales).
     Suborder Odontoceti are toothed (whales and dolphins).
(image from http://www.whalematch.org)
mohandasgandhi:

Global fish stocks are exploited or depleted to such an extent that without urgent measures we may be the last generation to catch food from the oceans.

Entire species of marine life will never be seen in the Anthropocene (the Age of Man), let alone tasted, if we do not curb our insatiable voracity for fish. Last year, global fish consumption hit a record high of 17 kg (37 pounds) per person per year, even though global fish stocks have continued to decline. On average, people eat four times as much fish now than they did in 1950.
Around 85% of global fish stocks are over-exploited, depleted, fully exploited or in recovery from exploitation. Only this week, a report suggested there may be fewer than 100 cod over the age of 13 years in the North Sea between the United Kingdom and Scandinavia. It’s a worrying sign that we are losing fish old enough to create offspring that replenish populations.
(Continue reading…)

Rich marine biodiversity and healthy oceans are what sustain life on land and without both, all life suffers. This is important.
To find out more about the critical issue of overfishing and to learn about what you as a consumer can do to avoid endangered seafood, click here.
thelovelyseas:

An all-black Commerson’s (or giant) frogfish, Antennarius commersonimoving from one piling to another, beneath a jetty. Frogfish are poor swimmers, and may use a combination of tail flapping from side to side and “jet propulsion” (shooting swallowed water out backward through their narrow gill openings) to move slowly through the water. (Ambon, Indonesia) by David Hall
shannon-wild:

Lilac-breasted Roller (Coracias caudatus) photographed in Kruger National Park, South Africa.
• www.shannonwild.com 
• https://facebook.com/shannonwild 
• www.shannon-wild.tumblr.com
• http://instagram.com/shannon__wild
The Lilac-breasted Roller (Coracias caudatus) is a member of the roller family of birds. It is widely distributed in sub-Saharan Africa and the southern Arabian Peninsula, preferring open woodland and savanna; it is largely absent from treeless places. Usually found alone or in pairs, it perches conspicuously at the tops of trees, poles or other high vantage points from where it can spot insects, lizards, scorpions, snails, small birds and rodents moving about at ground level.[2] Nesting takes place in a natural hole in a tree where a clutch of 2–4 eggs is laid, and incubated by both parents, who are extremely aggressive in defence of their nest, taking on raptors and other birds. During the breeding season the male will rise to great heights, descending in swoops and dives, while uttering harsh, discordant cries.
The sexes are alike in coloration. Juveniles do not have the long tail feathers that adults do.
This species is the national bird of Botswana and Kenya.
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