Question: Bubble-net feeding is a unique and complex feeding behavior engaged in by what animal, that has a distinctive body shape, with long pectoral fins and a knobbly head?

<P0-S0> The humpback whale ("Megaptera novaeangliae") is a species of baleen whale. <P0-S1>  One of the larger rorqual species, adults range in length from 12 - and weigh about 36000 kg . <P0-S2>  The humpback has a distinctive body shape, with long pectoral fins and a knobbly head. <P0-S3>  It is known for breaching and other distinctive surface behaviors, making it popular with whale watchers. <P0-S4>  Males produce a complex song lasting 10 to 20 minutes, which they repeat for hours at a time. <P0-S5>  Its purpose is not clear, though it may have a role in mating. <SEP> <P1-S0> Bubble-net feeding is a unique and complex feeding behavior engaged in by Humpback whales (Megaptera novaeangliae) and Bryde's whales in Gulf of Tosa (), Japan. <P1-S1>  It is one of the few surface feeding behaviors that humpback whales are known to engage in. <P1-S2>  This type of feeding is often done in groups. <P1-S3>  The group size can range from a minimum of two or three whales participating and up to sixty at one time. <P1-S4>  Whales can also perform a similar method of surface feeding called lunge feeding but is done solo. <SEP> <P2-S0> Asterolepis is an extinct genus of antiarch placoderms from the Devonian of North and South America and Europe. <P2-S1>  They were heavily armored flat-headed benthic detritivores with distinctive jointed limb-like pectoral fins and hollow spine. <P2-S2>  The armor plate gives the "Asterolepis" a box-like shape. <P2-S3>  Its pectoral fins are also armored but the caudal and dorsal fin are not. <P2-S4>  The first fossils were named by M. Eichwald in 1840 after noticing star-like markings on the fossils. <SEP> <P3-S0>  While the shark's jaw is loosely attached to the skull, the Callorhinchidae family differ in that their jaws are fused to their skulls. <P3-S1>  Many classify the Callorhinchidae as a chimeric species due to their shared characteristics of both the sharks and rays. <P3-S2>  The remainder of the body is flat and compressed, often described as elongated. <P3-S3>  Phylogenetically, they are the oldest group of living jawed Chondrichthyes. <P3-S4>  They are considered to resemble a cross between a shark and a ray or skate, but can be distinguished from sharks because they possess an operculum over their gill slits. <P3-S5>  They possess the same cartilaginous skeleton seen in sharks but are considered holocephali to distinguish them from the shark and ray categorization. <P3-S6>  They are found in muddy and sandy substrates of the ocean bottom, where they filter feed, with small shellfish making up the bulk of their diet. <P3-S7>  Because of this, it has been proposed to be used for entire genome sequencing to represent the cartilaginous fish class. <P3-S8>  Among the Chondrichthyes genome, "Callorhinchus" has the smallest genome. <P3-S9>  They are similar in form and habits to other chimaeras, but are distinguished by the presence of an elongated, flexible, fleshy snout, with a vague resemblance to a ploughshare. <P3-S10>  They also have two dorsal fins spaced widely apart, which help identify the species in the open ocean. <P3-S11>  They possess large pectoral fins, believed to aid in moving swiftly through the water. <P3-S12>  In addition to its utilization for feeding, the trunk of the Callorhinchus fish can sense movement and electric fields, allowing them to locate their prey. <P3-S13> The Callorhinchidae (sometimes spelled "Callorhynchidae"), or plough-nose chimaeras, are a family of marine fish containing one genus, Callorhinchus. <P3-S14>  Additionally, their skin is smooth, not covered in tough scales, characteristic of the shark.