Like all animals, corals will take time to reach sexual maturity. Massive hard corals such as Brain corals, grow slowly and it will take about 8 years before they are sexually mature. Since branching corals grow faster, they reach sexual maturity a few years earlier. The individual coral polyp can be male, female, both or may not be reproductively active at all. Corals are sessile animals and differ from most other cnidarians in not having a medusa stage in their life cycle. The body unit of the animal is a polyp.Most corals are colonial, the initial polyp budding to produce another and the colony gradually developing from this small start.
If the coral is colonial, then the polyp will go through asexual reproduction to form more polyps, expanding the size of the coral colony and increasing the number of coral polyps. When the adult polyps become sexually mature, the life cycle will begin all over again (steps 1-8). M aturity: Once a coral colony has reached a large enough size it becomes a reproductive adult. 2. G amete development: Within the coral’s many polyps, eggs develop over several months and sperm over several weeks. 3. S pawning: When fully developed, the eggs and sperm are released from the colony, often synchronously in spectacular.
Start studying section 26-2 sponges. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. an immature stage of an organism that looks different from the adult form. when they grow together they produce coral reefs most corals are colonial. sea anemones are solitary polyps?true or false? There are around 800 known species of hard coral, also known as the 'reef building' corals. Soft corals, which include seas fans, sea feathers and sea whips, don't have the rock-like calcareous skeleton like the others, instead they grow wood-like cores for support and fleshy rinds for protection.
Some species of jellyﬁsh release eggs and sperm directly into the water, where external fertilization then occurs. The fertilized egg cell, or zygote, passes through a series of developmental stages before becoming an adult. The early stages of development are called embryos. The ﬁrst embryonic stage occurs when the zygote divides in two. Coral Facts and Classification. Stony corals produce a skeleton of calcium carbonate crystals which they secrete from the epidermis of the lower part of their stalk and basal disc. The calcium carbonate they secrete forms a cup (or calyx) in which the coral polyp .