Science and Technology Current Affairs

World’s first fully warm-blooded fish named Opah discovered

World’s first fully warm-blooded fish named Opah or moonfish was discovered recently. It was discovered by scientists at the US National Oceanic and Atmospheric Administration (NOAA).

Opah or moonfish has ability to circulate heated blood throughout its body which makes it first fish known to be fully warm-blood.

Facts about Opah fish

  • Opah fish has rusty reddish color with white spots and bright red fins.
  • It weighs up to 90 kg and has an oval body shape.
  • It is deepwater denizen and usually found in oceans worldwide and generally found at depths of 50-400 m.
  • It is a vigorous predator in frigid ocean depths and preys on fish and squid.
  • Unique capability- It can internally generate heat through constant flapping of wing-like pectoral fins.
  • Its unique structure also help to prevent this heat from being lost to the environment as its gills lets warm blood to heat up cold blood returning from the gills’ respiratory surface.
  • This generated heat has an average muscle temperature about 4 to 50 C above the surrounding water temperature.
  • Being a warm-blooded fish it has distinct advantages such as faster swimming speeds and reaction times, better brain and eye function and withstand the effects of cold on vital organs compared to cold-bodied fish

Quick facts

Warm-blooded animals: They generate their own heat and maintain a body temperature independent of the environment. They are also known as endotherms. It should be noted most of mammals and birds are warm-blooded animals.

Cold-blooded animals: Their body temperature depends on the temperature of their surroundings. Thus they are hot when their environment is hot and cold when their environment is cold. They are also known as ectotherms. Most of amphibians, reptiles, invertebrates and most fish are cold-blooded animals.

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SBI launches sbiINTOUCH, NFC-enabled Contactless Debit and Credit Cards

India’s largest lender, State Bank of India (SBI) has launched contact-less credit and debit cards sbiINTOUCH.

sbiINTOUCH is based upon latest near-field technology (NFC) that enables customer to transact using the card by just tapping or waving it against the reader of the point-of-sale machine

Cards incorporated with NFC technology are secure and hassle-free. SBI is also proving a fraud liability cover of 1 lakh rupees on these cards.

With this, SBI has joined league of private lenders like ICICI Bank and HDFC Bank. It should be noted that ICICI bank was first to introduce contact-less credit and debit cards in India.

RBI rules on contact-less credit and debit cards

  • Presently, Reserve Bank of India (RBI) allows banks to enable transactions in case of contactless cards up to Rs. 2,000 without the requiring a separate PIN authentication.
  • But incase of amounts higher, banks should provide customers with an option of contact payment and pin authentication requirement.

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