Humpback whales (#megaptera novaeangliae) known as the gentle giants of the sea, can range from 48-60 ft of length and can weigh over 40 tons. they are known to make complex sounds creating songs that humans cannot understand, but still able to enjoy. not only do humpbacks inhabit almost every ocean on earth, they are known for their migration pattern from alaska to hawaii from november to may, peaking from january to march. spending their winters for over 200 years in hawaii, it is known that in their 3000 mile migration they birth their calves. the hawaiian waters give a perfect atmosphere for this since the waters are shallow and are free of the predators they may encountered in alaska. conservation of the humpback whales has improved throughout the years. by humans becoming more mindful and conscious of ocean environments we are able to prevent harm to the humpbacks, but people still present harm to them with pollutants and pesticides. this causes a toxic environment thus accelerating the decline in the number of calves surviving the migration to alaska. let’s be mindful and respectful of these beautiful creatures by not polluting our oceans. this way they can continue to captivate us with their intelligence and beauty every day.
post by: @ivannadiaz
photo by: @clarklittle
2 weeks ago
Whale sharks (rhincodon typus) are the largest fish on the planet, they can grow up to 40 ft and weighing 30,000 lbs. being filter feeders they have a diet consisting of plankton and nekton. according to the iucn list, these sharks have been categorized as endangered. whale sharks are known to be endangered due to the exposure to micro and macro plastic ingestion as a result of their filter feeding habits near the ocean's surfaces (fossi, 2017). these fish have a coastal, and offshore habitat, in tropical and subtropical oceans worldwide. theses places include the gulf of mexico, caribbean sea and hawaii. also including holbox, a small fishing village until 2002, where locals discovered tourism potential of the local aggregation of whale sharks (ziegler, 2012). holbox is an small island on the northeastern tip of the yucatan peninsula of mexico. whale sharks are known to crowd in the plankton rich waters where the gulf of mexico and the caribbean sea meet (i.e holbox island) from may to september every year. this being “the whale shark festival” brings an immense amount of shark tourism to the island, and is one of the largest and fastest developing whale shark watching industries in the world. that being said, the merging of species endangerment and increasing of the tourism volume creates an indicator of ecological and economical problems for this type of shark. fortunately, wildlife tourism of the area and the awareness of the vulnerability of this species manages to keep satisfying visitor experiences, while also ensuring these experiences do not alter their natural environment (needham & rollins, 2008). make sure to be aware of where your waste is going and say no to single use plastics to preserve these amazing animals.
post by: @ivannadiaz
photo by: @juansharks of @oceanramsey
One extremely unique feature of sharks that grasps the attention of biologists and engineers alike is their skin. sharkskin consists of dermal denticles. while they may seem similar to scales, they are more like tiny teeth tightly compacted and layered each one with a center of blood vessels and nerves and an outer layer of hard dentine (kennedy, 2017). although their shape varies with shark family and species, the individual dermal denticles are all small, hard, and pointed (dillon, 2015). the two major functions dermal denticles are used for is protection and to reduce drag in the water. due to their pattern and microstructure, many believe shark skin to be as strong as steel (martin, 2003). this strength in structure provides sharks with a chainmail-like protection from predators and threats. the dermal denticles are layered in a way that protects them without sacrificing mobility. with its reduction in turbulence and drag in the water, dermal denticles also allow sharks to swim faster and much quieter. engineers often try to mimic this structure for strength in such things as fiberglass or reinforced concrete (martin, 2003). it is often mimicked for increased hydrodynamics and mobility as well in competitive swimsuits and other fabrics (kennedy, 2017).
post by @_s_bec
photo by @juansharks
How many oysters are in this photo? when i collected this oyster i thought it was a single oyster from afar. this photo shows not one oyster but 5! i always underestimate the number of oysters i’ve collected until i start looking closer in the lab.
Here at drop we believe in the power of voices and ideas. we know that to make a change you need both and that is exactly what we want to instill in our students. the power of change. the power of innovation. the power of creativity. kids are full of this, bursting with it even, and with that they will change the world! 💧🌍⭐️💙
The ampullae of lorenzini is a system of sense organs, each consisting of a jelly-filled canal. these jelly-filled canals open at the surface of a pore through the dermis and epidermis of a shark. these canals create a sixth sense to a shark, these senses help them feel electric fields produced by the movement of nearby prey in murky ocean waters. they can sense their electric fields of their prey simply by the beating of the prey’s heart or the movement of their muscles. in 1678, an italian physician, stefano lorenzini was the first to discover these senses. he observed that the pores were connected to electrosensing cells that are filled with a clear mysterious jelly, however he did not understand the amazingness of this jelly. now it is known that in the jelly, positively charged particles move and transmit a current (conover, 2016). ampullae of lorenzini is located on the heads and snouts of the shark; and they are organized in set locations in different parts of the head of a shark. some are found on the tip of their snout to near where their eyes are. this one helps them perceive and track their preys during night time or when the prey is away from their viewpoint. the next location is located near the eye to the ventral part of their snout. this helps them detect the electricity emitted by the fish that are camouflage on the bottom. ampullae of lorenzini not only helps them find prey, but it also helps them have a sense of location. when a shark navigates long distances, it moves with respect of the magnetic field of the earth (hoyos-padilla, e.m. 2017). the changes of this field generate stimuli in another set of pores located in between the eye and the jaw, giving them sort of an internal compass to orient themselves. so next time you see a shark, know they already know you are there 😉
post by @ivannadiaz
photo by @juansharks