The Explorer Series:
Starting the last week of February, I’ll be hitting the road, camping, and hiking out of my 2006 Ford Explorer. With my inflatable camping pad and zero degree sleeping bag, I’ll head West to Utah and Colorado on a quest for stunning photos and a life of adventure. Stay tuned 📸
Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade and are the sister group to the rays.
Sharks have diversified into over 505 species. They range in size from the small dwarf lanternshark, a deep sea species of only 17 centimetres (6.7 in) in length, to the whale shark , the largest fish in the world, which reaches approximately 12 metres (39 ft) in length. Sharks are found in all seas and are common to depths of 2,000 metres (6,600 ft). They generally do not live in freshwater although there are a few known exceptions, such as the bull shark and the river shark, which can survive and be found in both seawater and freshwater. They breathe through five to seven gill slits. Sharks have a covering of dermal denticles that protects their skin from damage and parasites in addition to improving their fluid dynamics. They have several sets of replaceable teeth.
Well-known species such as the great white shark, tiger shark, blue shark, mako shark, and the hammerhead shark are apex predators—organisms at the top of their underwater food chain. Many shark populations are threatened by human activities.
Turtles are reptiles characterised by a special bony or cartilaginous shell developed from their ribs and acting as a shield.
The earliest known turtles date from 220 million years ago,making turtles one of the oldest reptile groups and a more ancient group than lizards, snakes or crocodiles. Of the 327 known species alive today, some are highly endangered.
Turtles are ectotherms—their internal temperature varies according to the ambient environment, commonly called cold-blooded. However, because of their high metabolic rate, leatherback sea turtles have a body temperature that is noticeably higher than that of the surrounding water.
Turtles are classified as amniotes, along with other reptiles, birds, and mammals. Like other amniotes, turtles breathe air and do not lay eggs underwater, although many species live in or around water. -Wikipedia