Young shark saved by seal rehabilitation workers


The young Lauwersoog shark

Translated from Blik op nieuws in the Netherlands today:

This Wednesday a beached starry smooth-hound shark was found at the Hoek van Bant, Lauwersoog by employees of the Seal Rehabilitation Centre Pieterburen. In close consultation with Mark de Boer of Rotterdam Zoo the animal was helped back to sea again.

Rehabilitation coördinator Michael Bakker Paiva of the Seal Centre Pieterburen has a very special week: last Sunday, he assisted in the rescue of a harbour porpoise and today he found a beached starry smooth-hound shark. The centre staff were reacting to a report about a dead seal and found the shark in shallow water in the Hoek van Bant, near Lauwersoog.

They had to act quickly, as low tide was starting.

Directly they discussed that with Mark de Boer of Rotterdam Zoo, because if the shark had to be cared for then it would go to Rotterdam.

Fortunately things went well for the animal and with the assistance of biologist Sander van Dijk of the Seal Centre Pieterburen the fish was helped into a bucket of water. Then the animal was freed in deep and calm water near the port of Lauwersoog.

This was a young shark, 85 centimeter. An adult may be 180 centimeter.

New tunnel for saving 350,000,000 migratory fish


This Dutch 2015 animation video is called Fish Migration River Afsluitdijk.

Translated from Dutch NOS TV:

The fish tunnel should prevent extinction of fish species

Today, 17:53

Fish from now on will be able to swim without problems from the Wadden Sea to the IJsselmeer. Rijkswaterstaat has opened a special fish passage in the Afsluitdijk near Den Oever in North Holland. Such a crossing is important because some fish need both fresh and salt water to survive and reproduce.

For years, locks, weirs and dams in the Afsluitdijk have blocked the way for fish from the Wadden Sea to swim to the IJsselmeer, or vice versa. Some species thereby are even threatened with extinction. Rijkswaterstaat felt they needed to address this type of barriers. …

[Ecologist] Van der Herk says: “In the IJsselmeer there are for example only 1 percent of the original number of eels. If eels do not swim to other waters, they just won’t reproduce. Then these fish will become extinct…”

Bypassing the blockages should improve the migration of fish. The special passage – a tube – was built for, eg, eel, smelt, salmon, river lamprey and stickleback. Experts think every year about 350 million migratory fish will use the passage in Den Oever.

Undersea marine biology lab, video


This video, recorded off Florida in the USA, says about itself:

Aquarius Reef Base (HD) | JONATHAN BIRD’S BLUE WORLD

20 May 2016

Jonathan visits Aquarius Reef Base–the world’s only undersea lab where scientists live in saturation for days or weeks at a time, studying the ocean. It’s an amazing combination of science fiction and undersea adventure!

Marine wildlife in Florida, USA, video


This video from the USA says about itself:

Jonathan Bird’s Blue World: Muck Diving in Florida

6 May 2016

Diving around a sandy, muddy, or rubbly sea floor is often called “muck” diving–even though there is rarely any actual muck. There are all kinds of unique and interesting animals that live in this habitat. Jonathan joins muck expert Jeff Nelson to visit a world-renown muck diving site under the Blue Heron Bridge in Riviera Beach, Florida to find all kinds of weird and outlandish animals like sea horses, octopuses (octopods!), batfish, snake eels, sea hares, and stingrays. But his main interest is finding a jawfish with eggs. You won’t believe how the male jawfish guards his eggs!

Fish of Monfragüe national park, Extremadura, Spain


This July 2015 video from the Guadalora river in Andalusia, Spain shows Tropidophoxinellus alburnoides (or: Squalius alburnoides) fish. This species lives a bit more to the north, in Extremadura, as well.

Still 13 April 2016 in Extremadura, Spain. We had arrived at Monfragüe national park. Before blogging about birds in that park, first about fish: based on a park sign, and this source.

Indigenous fish species in the park waters include the two barbel species Iberian barbel and Luciobarbus bocagei.

Also autochthonous: Iberian nase. And Iberochondrostoma lemmingii. Both species are related.

And Tropidophoxinellus alburnoides. And Squalius pyrenaicus.

All these autochthonous species mentioned here are endemic to Spain and Portugal.

This video from Spain says about itself:

20 January 2015

Brown trout (Salmo trutta), Iberian barbel (Luciobarbus bocagei) and Iberian nase (Pseudochondrotoma polylepis) ascending the vertical-slot fishway model built in Hydraulics Laboratory (Centre for studies and experimentation on public works, CEDEX).

Fish species of Monfragüe, introduced from elsewhere, include carp.

And Prussian carp (introduced from, originally, Asia).

And largemouth bass, pumpkinseed and black bullhead, all three from North America.

And northern pike. And zander.

And big wels catfish.

And much smaller eastern mosquitofish.

Marine animals helping each other, video


This video says about itself:

Jonathan Bird’s Blue World: Cleaning Stations (HD)

22 April 2016

Jonathan explores cleaning stations on the reef, where animals get cleaned of parasites and infection by other animals. Some examples shown are anemones and anemonefish (clownfish), wrasses, shrimp, manta rays, moray eels, Goliath groupers, sea turtles and barracuda. This episode was filmed in many locations such as Malaysia, the Philippines, Yap, Australia’s Great Barrier Reef and the Caribbean.

How marine animals live together, video


This video from the USA says about itself:

Jonathan Bird’s Blue World: Symbiosis In The Sea (HD)

15 April 2016

In this webisode Jonathan explores different types of symbiosis in the ocean, including mutualism, commensalism and parasitism, and how animals use it for survival.